[1] An antibiotic is -
A.
achemical synthesized by a human cell against a microorganism
B.
a chemical synthesised by amicro-organism against another micro-organisms
C.
a substance produced by blood cells against bacteria
D.
a substance produced by blood cells against infection.
Ans:
a chemical synthesised by amicro-organism against another micro-organisms
Explanation :
An antibacterial is an agent that inhibits bacterial growth or kills bacteria. The term is often used synonymously with the term antibiotic(s); today. The term antibiotic was first used in 1942 by Selman Waksman and his collaborators in journal articles to describe any substance produced by a microorganism that is antagonistic to the growth of other microorganisms in high dilution.
[2] Camel is a desert animal, that can live without water for many days, because -
A.
it does not need water
B.
water is formed in the body due to oxidation of fat
C.
it has the water sac in the walls of the lumen of stomach
D.
All of the above
Ans:
All of the above
Explanation :
Camels, in ideal conditions, can go 6-7 months without water but as the temperature rises they have to drink water more often. Camels are well known for their humps. They do not, however, literally store water in them as is commonly believed, though they do serve this purpose through roundabout means.
[3] A clone is a colony of :
A.
cells having different shapes
B.
cells having similar shape
C.
cells having similar genetic constitution
D.
cells having different genetic constitutions
Ans:
cells having similar genetic constitution
Explanation :
A clone is a colony of cells having similar genetic constitutions. A clone is a group of identical cells that share a common ancestry, meaning they are derived from the same mother cell A somewhat similar concept is that of clonal colony (also called a genet), wherein the cells (usually unicellular) also share a common ancestry.
[4] The age of a tree can be determined more or less accurately by -
A.
counting the number of branches
B.
measuring the height of the tree
C.
measuring the diameter of the trunk
D.
counting the number of rings in the trunk
Ans:
counting the number of rings in the trunk
Explanation :
When a tree has been cut down or felled, then it is relatively easy to work out its age by counting the growth or annual rings that can be seen on the sawn-off stump. Under the bark of a tree is a special tissue (called the cambium) which forms new cells so that the tree can grow.
[5] Which one of the following is true regarding plant cells and animal cells‘?
A.
Plant cells contain chloroplast while animal cells do not
B.
Plant cells are small while animal cells are large in size
C.
Plant cells contain nucleus while animal cells do not
D.
Plant cells and animal cells are similar in all respects
Ans:
Plant cells contain chloroplast while animal cells do not
Explanation :
Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.
[6] Which of the following is a perfect match?
A.
Coronary attack - vascular dilation
B.
Atherosclerosis - blockage of arteries
C.
Hypertension - low blood pressure
D.
Hypotension - heart attack
Ans:
Hypotension - heart attack
Explanation :
In physiology and medicine, hypotension is abnormally low blood pressure, especially in the arteries of the systemic circulation. Hypotension is the opposite of hypertension, which is high blood pressure. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood.
[7] In the case of test tube babies
A.
egg is fertilized in the uterus.
B.
embryo completes its development in a test tube.
C.
embryo is placed in uterus after 2 months.
D.
egg is fertilized outside mother's body.
Ans:
embryo is placed in uterus after 2 months.
Explanation :
Prior of the implantation of the blastocyst the uterus of the recipient mother should be made ready to receive the embryo. This is usually done with the hormonal treatment. The blastocyst is introduced into the uterus by one of the two methods
[8] Which of the following is correct About cold blooded animals?
A.
Their blood remains cold all the time
B.
Their body temperature changes in accordance with the atmosphere
C.
Their body temperature remains constant all the time
D.
They kill all the animals they come across (SSC Combined Graduate Level Prelim Exam.
Ans:
Their body temperature changes in accordance with the atmosphere
Explanation :
A cold blooded animal, or ectotherm, is one that does not have an internal mechanism for regulating its body temperature. Instead, a cold blooded animal relies on solar energy captured by the environment. Reptiles, amphibians and fish are examples of cold blooded animals. To change their body temperature, cold-blooded animals move to different places in their habitat. They may burrow under the ground, crawl under a log or a rock, etc. Cold-blooded means that the animals are ectothermic. They are dependent on the environment to control their body temperature.
[9] Quantity of fresh air required for a man is -
A.
1000 cubic feet of air for every 20 minutes
B.
1000 cubic feet of air for every 20 seconds
C.
1000 cubic feet of air for every 10 minutes
D.
1000 cubic feet of air for every 10 seconds
Ans:
1000 cubic feet of air for every 20 minutes
Explanation :
Breathing sixteen times every minute an average volume of air amounting to 30 cubic inches, we find that the expired air amounts to no less than 17 cubic feet per hour. This contaminated air contains only 16 per cent of oxygen, and 4.5 per cent of carbonic acid gas, and is sufficient to vitiate no less than 3,000 cubic feet of fresh air. Pure fresh air contains from 0.03 to 0.04 per cent of carbonic acid gas, or at the most.
[10] Dinosaurs were -
A.
mammals that became extinct
B.
large herbivorous creatures which gave rise to hippopotamus species
C.
egg-laying mammals
D.
reptiles that became extinct
Ans:
reptiles that became extinct
Explanation :
Although the word dinosaur means "terrible lizard," the name is somewhat misleading, as dinosaurs are not lizards. Rather, they represent a separate group of reptiles with a distinct upright posture not found in lizards, and many extinct forms did not exhibit traditional reptilian characteristics. Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to be sluggish and cold-blooded.
[11] What is the common in AIDS, mumps and poliomyelitis?
A.
Young children get affected most readily
B.
No effective vaccine has yet been developed for them
C.
These are caused by viruses
D.
Their germs can be transmit-ted through blood transfusions
Ans:
These are caused by viruses
Explanation :
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (AIDS). Mumps (epidemic parotitis) is a viral disease of the human species, caused by the mumps virus. Poliomyelitis is an acute, viral, infectious disease spread from person top erson, primarily via the fecal-oral route.
[12] A 'breath test' used by traffic police to check drunken driving uses:
A.
potassium dichromate-sulphuric acid
B.
potassium permanganate-sulphuric acid
C.
turmeric on filter paper
D.
silica gel coated with silver nitrate
Ans:
potassium dichromate-sulphuric acid
Explanation :
The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate. Reacting the sample with an excess of potassium dichromate, all ethanol is oxidized to acetic acid. One major application for this reaction is in old police breathalyzer tests. When alcohol vapor makes contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
[13] According to Darwin's Theory of Evolution, long necks in giraffes -
A.
arose because of constant attempt to reach leaves on tall trees, generation after generation
B.
do not give them any special advantage and is just an accident
C.
give them advantage in finding food, because of which those with long necks survive
D.
is a result of the special weather prevalent in African Savannah
Ans:
arose because of constant attempt to reach leaves on tall trees, generation after generation
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
An antibacterial is an agent that inhibits bacterial growth or kills bacteria. The term is often used synonymously with the term antibiotic(s); today. The term antibiotic was first used in 1942 by Selman Waksman and his collaborators in journal articles to describe any substance produced by a microorganism that is antagonistic to the growth of other microorganisms in high dilution.
[2] Camel is a desert animal, that can live without water for many days, because -
A.
it does not need water
B.
water is formed in the body due to oxidation of fat
C.
it has the water sac in the walls of the lumen of stomach
D.
All of the above
Ans:
All of the above
Explanation :
Camels, in ideal conditions, can go 6-7 months without water but as the temperature rises they have to drink water more often. Camels are well known for their humps. They do not, however, literally store water in them as is commonly believed, though they do serve this purpose through roundabout means.
[3] A clone is a colony of :
A.
cells having different shapes
B.
cells having similar shape
C.
cells having similar genetic constitution
D.
cells having different genetic constitutions
Ans:
cells having similar genetic constitution
Explanation :
A clone is a colony of cells having similar genetic constitutions. A clone is a group of identical cells that share a common ancestry, meaning they are derived from the same mother cell A somewhat similar concept is that of clonal colony (also called a genet), wherein the cells (usually unicellular) also share a common ancestry.
[4] The age of a tree can be determined more or less accurately by -
A.
counting the number of branches
B.
measuring the height of the tree
C.
measuring the diameter of the trunk
D.
counting the number of rings in the trunk
Ans:
counting the number of rings in the trunk
Explanation :
When a tree has been cut down or felled, then it is relatively easy to work out its age by counting the growth or annual rings that can be seen on the sawn-off stump. Under the bark of a tree is a special tissue (called the cambium) which forms new cells so that the tree can grow.
[5] Which one of the following is true regarding plant cells and animal cells‘?
A.
Plant cells contain chloroplast while animal cells do not
B.
Plant cells are small while animal cells are large in size
C.
Plant cells contain nucleus while animal cells do not
D.
Plant cells and animal cells are similar in all respects
Ans:
Plant cells contain chloroplast while animal cells do not
Explanation :
Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.
[6] Which of the following is a perfect match?
A.
Coronary attack - vascular dilation
B.
Atherosclerosis - blockage of arteries
C.
Hypertension - low blood pressure
D.
Hypotension - heart attack
Ans:
Hypotension - heart attack
Explanation :
In physiology and medicine, hypotension is abnormally low blood pressure, especially in the arteries of the systemic circulation. Hypotension is the opposite of hypertension, which is high blood pressure. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood.
[7] In the case of test tube babies
A.
egg is fertilized in the uterus.
B.
embryo completes its development in a test tube.
C.
embryo is placed in uterus after 2 months.
D.
egg is fertilized outside mother's body.
Ans:
embryo is placed in uterus after 2 months.
Explanation :
Prior of the implantation of the blastocyst the uterus of the recipient mother should be made ready to receive the embryo. This is usually done with the hormonal treatment. The blastocyst is introduced into the uterus by one of the two methods
[8] Which of the following is correct About cold blooded animals?
A.
Their blood remains cold all the time
B.
Their body temperature changes in accordance with the atmosphere
C.
Their body temperature remains constant all the time
D.
They kill all the animals they come across (SSC Combined Graduate Level Prelim Exam.
Ans:
Their body temperature changes in accordance with the atmosphere
Explanation :
A cold blooded animal, or ectotherm, is one that does not have an internal mechanism for regulating its body temperature. Instead, a cold blooded animal relies on solar energy captured by the environment. Reptiles, amphibians and fish are examples of cold blooded animals. To change their body temperature, cold-blooded animals move to different places in their habitat. They may burrow under the ground, crawl under a log or a rock, etc. Cold-blooded means that the animals are ectothermic. They are dependent on the environment to control their body temperature.
[9] Quantity of fresh air required for a man is -
A.
1000 cubic feet of air for every 20 minutes
B.
1000 cubic feet of air for every 20 seconds
C.
1000 cubic feet of air for every 10 minutes
D.
1000 cubic feet of air for every 10 seconds
Ans:
1000 cubic feet of air for every 20 minutes
Explanation :
Breathing sixteen times every minute an average volume of air amounting to 30 cubic inches, we find that the expired air amounts to no less than 17 cubic feet per hour. This contaminated air contains only 16 per cent of oxygen, and 4.5 per cent of carbonic acid gas, and is sufficient to vitiate no less than 3,000 cubic feet of fresh air. Pure fresh air contains from 0.03 to 0.04 per cent of carbonic acid gas, or at the most.
[10] Dinosaurs were -
A.
mammals that became extinct
B.
large herbivorous creatures which gave rise to hippopotamus species
C.
egg-laying mammals
D.
reptiles that became extinct
Ans:
reptiles that became extinct
Explanation :
Although the word dinosaur means "terrible lizard," the name is somewhat misleading, as dinosaurs are not lizards. Rather, they represent a separate group of reptiles with a distinct upright posture not found in lizards, and many extinct forms did not exhibit traditional reptilian characteristics. Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to be sluggish and cold-blooded.
[11] What is the common in AIDS, mumps and poliomyelitis?
A.
Young children get affected most readily
B.
No effective vaccine has yet been developed for them
C.
These are caused by viruses
D.
Their germs can be transmit-ted through blood transfusions
Ans:
These are caused by viruses
Explanation :
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (AIDS). Mumps (epidemic parotitis) is a viral disease of the human species, caused by the mumps virus. Poliomyelitis is an acute, viral, infectious disease spread from person top erson, primarily via the fecal-oral route.
[12] A 'breath test' used by traffic police to check drunken driving uses:
A.
potassium dichromate-sulphuric acid
B.
potassium permanganate-sulphuric acid
C.
turmeric on filter paper
D.
silica gel coated with silver nitrate
Ans:
potassium dichromate-sulphuric acid
Explanation :
The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate. Reacting the sample with an excess of potassium dichromate, all ethanol is oxidized to acetic acid. One major application for this reaction is in old police breathalyzer tests. When alcohol vapor makes contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
[13] According to Darwin's Theory of Evolution, long necks in giraffes -
A.
arose because of constant attempt to reach leaves on tall trees, generation after generation
B.
do not give them any special advantage and is just an accident
C.
give them advantage in finding food, because of which those with long necks survive
D.
is a result of the special weather prevalent in African Savannah
Ans:
arose because of constant attempt to reach leaves on tall trees, generation after generation
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
A clone is a colony of cells having similar genetic constitutions. A clone is a group of identical cells that share a common ancestry, meaning they are derived from the same mother cell A somewhat similar concept is that of clonal colony (also called a genet), wherein the cells (usually unicellular) also share a common ancestry.
[4] The age of a tree can be determined more or less accurately by -
A.
counting the number of branches
B.
measuring the height of the tree
C.
measuring the diameter of the trunk
D.
counting the number of rings in the trunk
Ans:
counting the number of rings in the trunk
Explanation :
When a tree has been cut down or felled, then it is relatively easy to work out its age by counting the growth or annual rings that can be seen on the sawn-off stump. Under the bark of a tree is a special tissue (called the cambium) which forms new cells so that the tree can grow.
[5] Which one of the following is true regarding plant cells and animal cells‘?
A.
Plant cells contain chloroplast while animal cells do not
B.
Plant cells are small while animal cells are large in size
C.
Plant cells contain nucleus while animal cells do not
D.
Plant cells and animal cells are similar in all respects
Ans:
Plant cells contain chloroplast while animal cells do not
Explanation :
Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.
[6] Which of the following is a perfect match?
A.
Coronary attack - vascular dilation
B.
Atherosclerosis - blockage of arteries
C.
Hypertension - low blood pressure
D.
Hypotension - heart attack
Ans:
Hypotension - heart attack
Explanation :
In physiology and medicine, hypotension is abnormally low blood pressure, especially in the arteries of the systemic circulation. Hypotension is the opposite of hypertension, which is high blood pressure. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood.
[7] In the case of test tube babies
A.
egg is fertilized in the uterus.
B.
embryo completes its development in a test tube.
C.
embryo is placed in uterus after 2 months.
D.
egg is fertilized outside mother's body.
Ans:
embryo is placed in uterus after 2 months.
Explanation :
Prior of the implantation of the blastocyst the uterus of the recipient mother should be made ready to receive the embryo. This is usually done with the hormonal treatment. The blastocyst is introduced into the uterus by one of the two methods
[8] Which of the following is correct About cold blooded animals?
A.
Their blood remains cold all the time
B.
Their body temperature changes in accordance with the atmosphere
C.
Their body temperature remains constant all the time
D.
They kill all the animals they come across (SSC Combined Graduate Level Prelim Exam.
Ans:
Their body temperature changes in accordance with the atmosphere
Explanation :
A cold blooded animal, or ectotherm, is one that does not have an internal mechanism for regulating its body temperature. Instead, a cold blooded animal relies on solar energy captured by the environment. Reptiles, amphibians and fish are examples of cold blooded animals. To change their body temperature, cold-blooded animals move to different places in their habitat. They may burrow under the ground, crawl under a log or a rock, etc. Cold-blooded means that the animals are ectothermic. They are dependent on the environment to control their body temperature.
[9] Quantity of fresh air required for a man is -
A.
1000 cubic feet of air for every 20 minutes
B.
1000 cubic feet of air for every 20 seconds
C.
1000 cubic feet of air for every 10 minutes
D.
1000 cubic feet of air for every 10 seconds
Ans:
1000 cubic feet of air for every 20 minutes
Explanation :
Breathing sixteen times every minute an average volume of air amounting to 30 cubic inches, we find that the expired air amounts to no less than 17 cubic feet per hour. This contaminated air contains only 16 per cent of oxygen, and 4.5 per cent of carbonic acid gas, and is sufficient to vitiate no less than 3,000 cubic feet of fresh air. Pure fresh air contains from 0.03 to 0.04 per cent of carbonic acid gas, or at the most.
[10] Dinosaurs were -
A.
mammals that became extinct
B.
large herbivorous creatures which gave rise to hippopotamus species
C.
egg-laying mammals
D.
reptiles that became extinct
Ans:
reptiles that became extinct
Explanation :
Although the word dinosaur means "terrible lizard," the name is somewhat misleading, as dinosaurs are not lizards. Rather, they represent a separate group of reptiles with a distinct upright posture not found in lizards, and many extinct forms did not exhibit traditional reptilian characteristics. Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to be sluggish and cold-blooded.
[11] What is the common in AIDS, mumps and poliomyelitis?
A.
Young children get affected most readily
B.
No effective vaccine has yet been developed for them
C.
These are caused by viruses
D.
Their germs can be transmit-ted through blood transfusions
Ans:
These are caused by viruses
Explanation :
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (AIDS). Mumps (epidemic parotitis) is a viral disease of the human species, caused by the mumps virus. Poliomyelitis is an acute, viral, infectious disease spread from person top erson, primarily via the fecal-oral route.
[12] A 'breath test' used by traffic police to check drunken driving uses:
A.
potassium dichromate-sulphuric acid
B.
potassium permanganate-sulphuric acid
C.
turmeric on filter paper
D.
silica gel coated with silver nitrate
Ans:
potassium dichromate-sulphuric acid
Explanation :
The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate. Reacting the sample with an excess of potassium dichromate, all ethanol is oxidized to acetic acid. One major application for this reaction is in old police breathalyzer tests. When alcohol vapor makes contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
[13] According to Darwin's Theory of Evolution, long necks in giraffes -
A.
arose because of constant attempt to reach leaves on tall trees, generation after generation
B.
do not give them any special advantage and is just an accident
C.
give them advantage in finding food, because of which those with long necks survive
D.
is a result of the special weather prevalent in African Savannah
Ans:
arose because of constant attempt to reach leaves on tall trees, generation after generation
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.
[6] Which of the following is a perfect match?
A.
Coronary attack - vascular dilation
B.
Atherosclerosis - blockage of arteries
C.
Hypertension - low blood pressure
D.
Hypotension - heart attack
Ans:
Hypotension - heart attack
Explanation :
In physiology and medicine, hypotension is abnormally low blood pressure, especially in the arteries of the systemic circulation. Hypotension is the opposite of hypertension, which is high blood pressure. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood.
[7] In the case of test tube babies
A.
egg is fertilized in the uterus.
B.
embryo completes its development in a test tube.
C.
embryo is placed in uterus after 2 months.
D.
egg is fertilized outside mother's body.
Ans:
embryo is placed in uterus after 2 months.
Explanation :
Prior of the implantation of the blastocyst the uterus of the recipient mother should be made ready to receive the embryo. This is usually done with the hormonal treatment. The blastocyst is introduced into the uterus by one of the two methods
[8] Which of the following is correct About cold blooded animals?
A.
Their blood remains cold all the time
B.
Their body temperature changes in accordance with the atmosphere
C.
Their body temperature remains constant all the time
D.
They kill all the animals they come across (SSC Combined Graduate Level Prelim Exam.
Ans:
Their body temperature changes in accordance with the atmosphere
Explanation :
A cold blooded animal, or ectotherm, is one that does not have an internal mechanism for regulating its body temperature. Instead, a cold blooded animal relies on solar energy captured by the environment. Reptiles, amphibians and fish are examples of cold blooded animals. To change their body temperature, cold-blooded animals move to different places in their habitat. They may burrow under the ground, crawl under a log or a rock, etc. Cold-blooded means that the animals are ectothermic. They are dependent on the environment to control their body temperature.
[9] Quantity of fresh air required for a man is -
A.
1000 cubic feet of air for every 20 minutes
B.
1000 cubic feet of air for every 20 seconds
C.
1000 cubic feet of air for every 10 minutes
D.
1000 cubic feet of air for every 10 seconds
Ans:
1000 cubic feet of air for every 20 minutes
Explanation :
Breathing sixteen times every minute an average volume of air amounting to 30 cubic inches, we find that the expired air amounts to no less than 17 cubic feet per hour. This contaminated air contains only 16 per cent of oxygen, and 4.5 per cent of carbonic acid gas, and is sufficient to vitiate no less than 3,000 cubic feet of fresh air. Pure fresh air contains from 0.03 to 0.04 per cent of carbonic acid gas, or at the most.
[10] Dinosaurs were -
A.
mammals that became extinct
B.
large herbivorous creatures which gave rise to hippopotamus species
C.
egg-laying mammals
D.
reptiles that became extinct
Ans:
reptiles that became extinct
Explanation :
Although the word dinosaur means "terrible lizard," the name is somewhat misleading, as dinosaurs are not lizards. Rather, they represent a separate group of reptiles with a distinct upright posture not found in lizards, and many extinct forms did not exhibit traditional reptilian characteristics. Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to be sluggish and cold-blooded.
[11] What is the common in AIDS, mumps and poliomyelitis?
A.
Young children get affected most readily
B.
No effective vaccine has yet been developed for them
C.
These are caused by viruses
D.
Their germs can be transmit-ted through blood transfusions
Ans:
These are caused by viruses
Explanation :
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (AIDS). Mumps (epidemic parotitis) is a viral disease of the human species, caused by the mumps virus. Poliomyelitis is an acute, viral, infectious disease spread from person top erson, primarily via the fecal-oral route.
[12] A 'breath test' used by traffic police to check drunken driving uses:
A.
potassium dichromate-sulphuric acid
B.
potassium permanganate-sulphuric acid
C.
turmeric on filter paper
D.
silica gel coated with silver nitrate
Ans:
potassium dichromate-sulphuric acid
Explanation :
The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate. Reacting the sample with an excess of potassium dichromate, all ethanol is oxidized to acetic acid. One major application for this reaction is in old police breathalyzer tests. When alcohol vapor makes contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
[13] According to Darwin's Theory of Evolution, long necks in giraffes -
A.
arose because of constant attempt to reach leaves on tall trees, generation after generation
B.
do not give them any special advantage and is just an accident
C.
give them advantage in finding food, because of which those with long necks survive
D.
is a result of the special weather prevalent in African Savannah
Ans:
arose because of constant attempt to reach leaves on tall trees, generation after generation
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Prior of the implantation of the blastocyst the uterus of the recipient mother should be made ready to receive the embryo. This is usually done with the hormonal treatment. The blastocyst is introduced into the uterus by one of the two methods
[8] Which of the following is correct About cold blooded animals?
A.
Their blood remains cold all the time
B.
Their body temperature changes in accordance with the atmosphere
C.
Their body temperature remains constant all the time
D.
They kill all the animals they come across (SSC Combined Graduate Level Prelim Exam.
Ans:
Their body temperature changes in accordance with the atmosphere
Explanation :
A cold blooded animal, or ectotherm, is one that does not have an internal mechanism for regulating its body temperature. Instead, a cold blooded animal relies on solar energy captured by the environment. Reptiles, amphibians and fish are examples of cold blooded animals. To change their body temperature, cold-blooded animals move to different places in their habitat. They may burrow under the ground, crawl under a log or a rock, etc. Cold-blooded means that the animals are ectothermic. They are dependent on the environment to control their body temperature.
[9] Quantity of fresh air required for a man is -
A.
1000 cubic feet of air for every 20 minutes
B.
1000 cubic feet of air for every 20 seconds
C.
1000 cubic feet of air for every 10 minutes
D.
1000 cubic feet of air for every 10 seconds
Ans:
1000 cubic feet of air for every 20 minutes
Explanation :
Breathing sixteen times every minute an average volume of air amounting to 30 cubic inches, we find that the expired air amounts to no less than 17 cubic feet per hour. This contaminated air contains only 16 per cent of oxygen, and 4.5 per cent of carbonic acid gas, and is sufficient to vitiate no less than 3,000 cubic feet of fresh air. Pure fresh air contains from 0.03 to 0.04 per cent of carbonic acid gas, or at the most.
[10] Dinosaurs were -
A.
mammals that became extinct
B.
large herbivorous creatures which gave rise to hippopotamus species
C.
egg-laying mammals
D.
reptiles that became extinct
Ans:
reptiles that became extinct
Explanation :
Although the word dinosaur means "terrible lizard," the name is somewhat misleading, as dinosaurs are not lizards. Rather, they represent a separate group of reptiles with a distinct upright posture not found in lizards, and many extinct forms did not exhibit traditional reptilian characteristics. Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to be sluggish and cold-blooded.
[11] What is the common in AIDS, mumps and poliomyelitis?
A.
Young children get affected most readily
B.
No effective vaccine has yet been developed for them
C.
These are caused by viruses
D.
Their germs can be transmit-ted through blood transfusions
Ans:
These are caused by viruses
Explanation :
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (AIDS). Mumps (epidemic parotitis) is a viral disease of the human species, caused by the mumps virus. Poliomyelitis is an acute, viral, infectious disease spread from person top erson, primarily via the fecal-oral route.
[12] A 'breath test' used by traffic police to check drunken driving uses:
A.
potassium dichromate-sulphuric acid
B.
potassium permanganate-sulphuric acid
C.
turmeric on filter paper
D.
silica gel coated with silver nitrate
Ans:
potassium dichromate-sulphuric acid
Explanation :
The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate. Reacting the sample with an excess of potassium dichromate, all ethanol is oxidized to acetic acid. One major application for this reaction is in old police breathalyzer tests. When alcohol vapor makes contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
[13] According to Darwin's Theory of Evolution, long necks in giraffes -
A.
arose because of constant attempt to reach leaves on tall trees, generation after generation
B.
do not give them any special advantage and is just an accident
C.
give them advantage in finding food, because of which those with long necks survive
D.
is a result of the special weather prevalent in African Savannah
Ans:
arose because of constant attempt to reach leaves on tall trees, generation after generation
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Breathing sixteen times every minute an average volume of air amounting to 30 cubic inches, we find that the expired air amounts to no less than 17 cubic feet per hour. This contaminated air contains only 16 per cent of oxygen, and 4.5 per cent of carbonic acid gas, and is sufficient to vitiate no less than 3,000 cubic feet of fresh air. Pure fresh air contains from 0.03 to 0.04 per cent of carbonic acid gas, or at the most.
[10] Dinosaurs were -
A.
mammals that became extinct
B.
large herbivorous creatures which gave rise to hippopotamus species
C.
egg-laying mammals
D.
reptiles that became extinct
Ans:
reptiles that became extinct
Explanation :
Although the word dinosaur means "terrible lizard," the name is somewhat misleading, as dinosaurs are not lizards. Rather, they represent a separate group of reptiles with a distinct upright posture not found in lizards, and many extinct forms did not exhibit traditional reptilian characteristics. Through the first half of the 20th century, before birds were recognized to be dinosaurs, most of the scientific community believed dinosaurs to be sluggish and cold-blooded.
[11] What is the common in AIDS, mumps and poliomyelitis?
A.
Young children get affected most readily
B.
No effective vaccine has yet been developed for them
C.
These are caused by viruses
D.
Their germs can be transmit-ted through blood transfusions
Ans:
These are caused by viruses
Explanation :
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (AIDS). Mumps (epidemic parotitis) is a viral disease of the human species, caused by the mumps virus. Poliomyelitis is an acute, viral, infectious disease spread from person top erson, primarily via the fecal-oral route.
[12] A 'breath test' used by traffic police to check drunken driving uses:
A.
potassium dichromate-sulphuric acid
B.
potassium permanganate-sulphuric acid
C.
turmeric on filter paper
D.
silica gel coated with silver nitrate
Ans:
potassium dichromate-sulphuric acid
Explanation :
The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate. Reacting the sample with an excess of potassium dichromate, all ethanol is oxidized to acetic acid. One major application for this reaction is in old police breathalyzer tests. When alcohol vapor makes contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
[13] According to Darwin's Theory of Evolution, long necks in giraffes -
A.
arose because of constant attempt to reach leaves on tall trees, generation after generation
B.
do not give them any special advantage and is just an accident
C.
give them advantage in finding food, because of which those with long necks survive
D.
is a result of the special weather prevalent in African Savannah
Ans:
arose because of constant attempt to reach leaves on tall trees, generation after generation
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Human immunodeficiency virus (HIV) is a lentivirus (a member of the retrovirus family) that causes acquired immunodeficiency syndrome (AIDS). Mumps (epidemic parotitis) is a viral disease of the human species, caused by the mumps virus. Poliomyelitis is an acute, viral, infectious disease spread from person top erson, primarily via the fecal-oral route.
[12] A 'breath test' used by traffic police to check drunken driving uses:
A.
potassium dichromate-sulphuric acid
B.
potassium permanganate-sulphuric acid
C.
turmeric on filter paper
D.
silica gel coated with silver nitrate
Ans:
potassium dichromate-sulphuric acid
Explanation :
The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium dichromate. Reacting the sample with an excess of potassium dichromate, all ethanol is oxidized to acetic acid. One major application for this reaction is in old police breathalyzer tests. When alcohol vapor makes contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
[13] According to Darwin's Theory of Evolution, long necks in giraffes -
A.
arose because of constant attempt to reach leaves on tall trees, generation after generation
B.
do not give them any special advantage and is just an accident
C.
give them advantage in finding food, because of which those with long necks survive
D.
is a result of the special weather prevalent in African Savannah
Ans:
arose because of constant attempt to reach leaves on tall trees, generation after generation
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Darwin was the first to propose that long necks evolved in giraffes because they enabled the animals to eat foliage beyond the reach of shorter browsers. Darwin himself wrote %it seems to me almost certain that an ordinary hoofed quadruped might be converted into a giraffe.' He speculated that four-legged animals with longer and longer necks would be capable of reaching higher leaves and vegetation.
[14] Sugarcane plants are usually propagated by vegetative means because -
A.
they do not produce seeds
B.
it is possible to maintain genetic quality
C.
the incidence of disease may be reduced
D.
None of these
Ans:
they do not produce seeds
Explanation :
Vegetative reproduction is a form of asexual reproduction in plants. It is a process by which new individuals arise without production of seeds or spores. The methods of vegetative propagation include cutting, vegetative apomixis, layering, division, budding, grafting and tissue culture.
[15] The term 'GM food' refers to the food -
A.
that grows under genetic measures
B.
that is genetically modified
C.
that grows under geographical modification
D.
with greater glucose metabolism
Ans:
that is genetically modified
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Genetically, modified foods (GM foods) are foods derived from genetically modified organisms (GM0s), such as genetically modified crops or genetically modified fish. GMOs have had specific changes introduced into their DNA by genetic engineering techniques. These techniques are much more precise than mutagenesis (mutation breeding) where an organism is exposed to radiation or chemicals to create a non-specific but stable change. Other techniques by which humans modify food organisms include selective breeding; plant breeding, and animal breeding, and somaclonal variation.
[16] Why excessive heating and repeated use of cooking oil are most undesirable?
A.
The oil vapour can cause indoor pollution
B.
Carcinogenic substances like benzpyrene are produced
C.
Nutrient value of food is lost
D.
Loss and wastage of oil
Ans:
Carcinogenic substances like benzpyrene are produced
Explanation :
Repeated use of cooking oil at high temperatures will cause the hydraulic fat into free fatty acids are easily oxidized, so that the oil becomes rancid and form trans fatty acids can lead to health problems associated with the metabolism of cholesterol, high blood pressure, and heart. Not only that, the repeated use of used oil will also form acrolein is a compound that causes intense itching in the throat and cause coughing. And that is not less dangerous, this oil is a carcinogen that can cause cancer. Therefore, experts recommend eating foods that contain saturated fat less than 10 percent of the daily intake.
[17] Flat footed camels can walk easily in sandy deserts because -
A.
pressure on the sand is decreased by increasing the area of the surface in contact
B.
pressure on the sand is increased by increasing the area of the surface in contact
C.
pressure on the sand is decreased by decreasing the area of the surface in contact
D.
pressure on the sand is increased by decreasing the area of the surface in contact
Ans:
pressure on the sand is decreased by increasing the area of the surface in contact
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Camels have broad, flat, leathery pads with two toes on each foot. When the camel places its foot on the ground the pads spread, preventing the foot from sinking into the sand. When walking, the camel moves both feet on one side of its body, then both feet on the other. This gait suggests the rolling motion of a boat, explaining the camel's 'ship of the desert' nickname. The pad supports the animal on loose sand in much the same way that a snowshoe helps a person walk on snow.
[18] A large number of identical plants can be obtained in a short span of time through -
A.
large number of seeds of a single plant
B.
stern cuttings
C.
tissue culture technique
D.
hydroponics method
Ans:
tissue culture technique
Explanation :
Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues or organs under sterile conditions on a nutrient culture medium of known composition. Plant tissue culture is widely used to produce clones of a plant in a method known as micropropagation. Plant tissue culture relies on the fact that many plant cells have the ability to regenerate a whole plant (totipotency). The culture medium contains a gel (agar) with the proper mixture of nutrients, sugars, vitamins and hormones, which causes the plant part to grow at very rapid rates to produce new plantlets.
[19] Full form of the infectious disease SARS is -
A.
Syndrome Associated with Respiratory Symptoms
B.
Severe Acute Respiratory Syndrome
C.
Severe Asthmatic Respiratory Syndrome
D.
Syndrome Alarm on Respiratory System
Ans:
Severe Acute Respiratory Syndrome
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Severe acute respiratory syndrome (SARS) is a serious form of pneumonia. It is caused by a virus that was first identified in 2003. Infection with the SARS virus causes acute respiratory distress (severe breathing difficulty) and sometimes death. SARS is a dramatic example of how quickly world travel can spread a disease. It is also an example of how quickly a connected health system can respond to a new health threat. SARS is caused by a member of the coronavirus family of viruses (the same family that can cause the common cold).
[20] In test-tube babies, the -
A.
Ovum is fertilized and developed in test-tubes
B.
Ovum is fertilized in the test-tubes and developed in uterus
C.
Ovum is fertilized in the uterus and developed in test-tubes
D.
Ovum is developed without fertilization in test-tubes
Ans:
Ovum is fertilized in the test-tubes and developed in uterus
Explanation :
In vitro fertilization is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium in a laboratory. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[21] Human beings have two ears because two ears help -
A.
to judge the direction of sound
B.
to hear even a feeble sound
C.
to enjoy music better
D.
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Ans:
to distinguish between two kinds of sounds arriving at the ears in opposite directions
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
We have two ears basically to widen the scope of hearing so that we can find out where sounds are coming from, and from what distance; i.e., sound localization. The brain utilizes subtle differences in intensity, spectral, and timing cues to allow us to localize sound sources
[22] Cultivable land is defined as
A.
land actually under crops
B.
cultivable waste land + fallow land
C.
old fallow lands 4- current fallow lands
D.
total fallow lands + net sown area
Ans:
total fallow lands + net sown area
Explanation :
Cultivable land refers to the land capable of being cultivated. It consists of net area sown, total fallow lands, culturable wasteland and land under miscellaneous tree crops.
[23] Which one of the followings is/are correct definition of Habitat?
A.
A complex of several types of communities
B.
Natural environment of a living organism
C.
The place where one would go find the particular living organism.
D.
Natural environment of a living organism and the place where one would go find the particular living organism.
Ans:
Natural environment of a living organism and the place where one would go find the particular living organism.
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
Habitat is generally defined as the natural environment of an organism, the place in which it is natural for it to live and grow. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. It is similar in meaning to biotope an area of uniform environmental conditions associated with a particular community of plants and animals
[24] In bio fortification technique plant breeders use breeding to overcome -
A.
Loss due to insect pests
B.
Decrease in food production
C.
Deficiencies of micronutrients and vitamins
D.
Loss due to plant diseases
Ans:
Deficiencies of micronutrients and vitamins
Explanation :
Biofortification refers to the breeding of crops to increase their nutritional value. The crops produced through biofortification method are always rich in nutrients like iron, zinc and Vitamin A.
[25] The five key indicators of global climate change of our planet are
A.
Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level
B.
Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice
C.
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
D.
None of these
Ans:
Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level
Explanation :
National Aeronautics and Space Administration (NASA) has developed a series of interactive maps and graphs to describe the global climate and how it has changed over time. They focus on 5 key climate indicators: • carbon dioxide concentration • global surface temperature * Arctic sea ice • land ice • sea level