[1] Endoscope is an instrument used to detect the ulcers in the stomach has a long narrow tube (with a small glowing bulb at one end) which is inserted in to the stomach through the mouth contains.
A.
small current carrying wire
B.
a narrow tube containing water
C.
optical fibre
D.
a narrow tube containing some chemical solution
Ans:
optical fibre
Explanation :
An endoscope can consist of a rigid or flexible tube and a light delivery system to illuminate the organ or object under inspection. The light source is normally outside the body and the light is typically directed via an optical fiber system. A lens system transmits the image from the objective lens to the viewer, typically a relay lens system in the case of rigid endoscopes or a bundle of fiber optics in the case of a fiberscope.
[2] Kelp is -
A.
Sulphide mineral of iron
B.
Partially decomposed vegetalion
C.
Sea weed rich in iodine content
D.
An aluminum silicate mineral
Ans:
Sea weed rich in iodine content
Explanation :
Kelps are large seaweeds (algae) belonging to the brown algae in the order Laminariales. Because of its high concentration of iodine, kelp has been used to treat goiter, an enlargement of the thyroid gland caused by a lack of iodine.
[3] Which of the following plant hormones are incorrectly paired?
A.
abscisic acid- transpiration
B.
auxins- apical dominance
C.
cytoldnins- senescence
D.
gibberlins- bud and seed dormancy
Ans:
gibberlins- bud and seed dormancy
Explanation :
Abscisic acid is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.
[4] Which of the following is true with reference to blood platelets?
A.
They have prominent nuclei
B.
They are involved in phagocytosis
C.
They have a pigment called haemoglobin
D.
They are also called thrombocytes
Ans:
They are also called thrombocytes
Explanation :
Platelets, also called thrombocytes, are a component of blood whose function is to stop bleeding by clumping and clotting blood vessel injuries. Unlike red and white blood cells, platelets are not actually cells but rather small fragments of cells.
[5] The second Green Revolution aims at increasing agricultural output to promote -
A.
Availability of easy credit to big farmers
B.
Co-operative farming
C.
Inclusive growth
D.
Development of rural sector
Ans:
Inclusive growth
Explanation :
In the Indian context, the Second Green Revolution is a change in agricultural production widely thought necessary to feed and sustain the growing population on Earth and promote inclusive growth. As per the Eleventh Plan document, the Second Green Revolution aims to meet the problems of small and marginal farmers for providing income security to a large section of rural households and treating them as partners of development instead of a mere beneficiary of some government schemes or programme.
[6] Food crops comprise.
A.
Cotton, Tobacco, Sugarcane
B.
Linseed, Castor, Turmeric
C.
Foodgrains, Pulses, Edible oilseeds
D.
Jute, Cotton, Chilies
Ans:
Foodgrains, Pulses, Edible oilseeds
Explanation :
Food crops are any agricultural product that can be eaten. Examples of food crops include food grains (Wheat, Rice, Maize) pulses, soybeans, sunflowers, sorghum, and edible oils (mustard, sunflower, etc). On the contrary, the term non food crop applies to the use of agricultural crops for uses other than human (as food) or animal consumption (as feed).
[7] Point out the incorrect pair -
A.
Green Revolution - Agricultural Development
B.
White Revolution - Dairy Development
C.
Blue Revolution - Development of Fisheries
D.
Operation Flood - Irrigation Development
Ans:
Operation Flood - Irrigation Development
Explanation :
Operation Flood, launched in 1970 is a project of the National Dairy Development Board (NDDB), which was the world's biggest dairy development program. It made India, a milk-sufficient nation, the largest milk producer in the world, surpassing the USA in 1998. Operation flood is also called White Revolution of India.
[8] Transpiration increases in -
A.
Hot, thy and windy condition
B.
Hot, damp and windy condition
C.
Cool, damp and windy condition
D.
Cool, dry and still condition
Ans:
Hot, thy and windy condition
Explanation :
Relative humidity: As the relative humidity of the air surrounding the plant rises the transpiration rate falls. It is easier for water to evaporate into dryer air than into more saturated air. Wind and air movement: Increased movement of the air around a plant will result in a higher transpiration rate.
[9] For a healthy heart, one needs to take a balanced diet, adequate sleep and -
A.
indulge in vigorous mental activities
B.
play games like carrom, chess and cards
C.
do right amount of physical exercise
D.
do sedentary work
Ans:
do right amount of physical exercise
Explanation :
Physical activity is any form of movement that works our muscles and uses more energy than we use when resting. Walking, running, dancing, swimming, yoga and gardening are examples of physical activity. Being physically active, along with following a healthy diet and not smoking, is one of the most important things one can do to keep heart and lungs healthy. Physical activity strengthens our heart and reduces coronary heart disease risk factors.
[10] Which of the following statements is true?
A.
Dehusked cereals and pulses are more nutritious
B.
Whole grain cereals and pulses are more nutritious
C.
Processed cereal products are nutrient dense
D.
Breakfast cereals are nutrient dense
Ans:
Whole grain cereals and pulses are more nutritious
Explanation :
Cereal and pulse crops are staple foods that provide essential nutrients to many populations of the world. Traditionally, whole grains were consumed but most current foods are derived from refined fractions of cereal and pulse crops. Consumption of processed or refined, products may reduce the health benefits of food. In wheat-based processed foods, for example, the removed 40% of the grain (mainly the bran and the germ of the wheat grain) contains the majority of the health beneficial components.
[11] The main use of salt in the diet is to -
A.
increase the solubility of the food particles in water.
B.
produce in small amounts the hydrochloric acid required for the digestion of food
C.
ease the process of cooking
D.
make the taste of the food better
Ans:
produce in small amounts the hydrochloric acid required for the digestion of food
Explanation :
Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
[12] Which of the following correctly explains the phenomenon of "Test Tube Bally"?
A.
When every process of embryo formation is in the test tube.
B.
When the embryo develops in a test tube.
C.
When the fertilisation is external and development is internal.
D.
When the fertilisation is internal and development is external.
Ans:
When the fertilisation is external and development is internal.
Explanation :
Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[13] Which of the following events occurred first?
A.
DNA structure of genes was discovered by James D Watson and Francis Crick
B.
Yuri Gagarin became the first man in space
C.
World's first human heart transplant was performed by Dr. Christian Barnard
D.
World's first test tube baby Louise Brown was born in U.K.
Ans:
DNA structure of genes was discovered by James D Watson and Francis Crick
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
An endoscope can consist of a rigid or flexible tube and a light delivery system to illuminate the organ or object under inspection. The light source is normally outside the body and the light is typically directed via an optical fiber system. A lens system transmits the image from the objective lens to the viewer, typically a relay lens system in the case of rigid endoscopes or a bundle of fiber optics in the case of a fiberscope.
[2] Kelp is -
A.
Sulphide mineral of iron
B.
Partially decomposed vegetalion
C.
Sea weed rich in iodine content
D.
An aluminum silicate mineral
Ans:
Sea weed rich in iodine content
Explanation :
Kelps are large seaweeds (algae) belonging to the brown algae in the order Laminariales. Because of its high concentration of iodine, kelp has been used to treat goiter, an enlargement of the thyroid gland caused by a lack of iodine.
[3] Which of the following plant hormones are incorrectly paired?
A.
abscisic acid- transpiration
B.
auxins- apical dominance
C.
cytoldnins- senescence
D.
gibberlins- bud and seed dormancy
Ans:
gibberlins- bud and seed dormancy
Explanation :
Abscisic acid is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.
[4] Which of the following is true with reference to blood platelets?
A.
They have prominent nuclei
B.
They are involved in phagocytosis
C.
They have a pigment called haemoglobin
D.
They are also called thrombocytes
Ans:
They are also called thrombocytes
Explanation :
Platelets, also called thrombocytes, are a component of blood whose function is to stop bleeding by clumping and clotting blood vessel injuries. Unlike red and white blood cells, platelets are not actually cells but rather small fragments of cells.
[5] The second Green Revolution aims at increasing agricultural output to promote -
A.
Availability of easy credit to big farmers
B.
Co-operative farming
C.
Inclusive growth
D.
Development of rural sector
Ans:
Inclusive growth
Explanation :
In the Indian context, the Second Green Revolution is a change in agricultural production widely thought necessary to feed and sustain the growing population on Earth and promote inclusive growth. As per the Eleventh Plan document, the Second Green Revolution aims to meet the problems of small and marginal farmers for providing income security to a large section of rural households and treating them as partners of development instead of a mere beneficiary of some government schemes or programme.
[6] Food crops comprise.
A.
Cotton, Tobacco, Sugarcane
B.
Linseed, Castor, Turmeric
C.
Foodgrains, Pulses, Edible oilseeds
D.
Jute, Cotton, Chilies
Ans:
Foodgrains, Pulses, Edible oilseeds
Explanation :
Food crops are any agricultural product that can be eaten. Examples of food crops include food grains (Wheat, Rice, Maize) pulses, soybeans, sunflowers, sorghum, and edible oils (mustard, sunflower, etc). On the contrary, the term non food crop applies to the use of agricultural crops for uses other than human (as food) or animal consumption (as feed).
[7] Point out the incorrect pair -
A.
Green Revolution - Agricultural Development
B.
White Revolution - Dairy Development
C.
Blue Revolution - Development of Fisheries
D.
Operation Flood - Irrigation Development
Ans:
Operation Flood - Irrigation Development
Explanation :
Operation Flood, launched in 1970 is a project of the National Dairy Development Board (NDDB), which was the world's biggest dairy development program. It made India, a milk-sufficient nation, the largest milk producer in the world, surpassing the USA in 1998. Operation flood is also called White Revolution of India.
[8] Transpiration increases in -
A.
Hot, thy and windy condition
B.
Hot, damp and windy condition
C.
Cool, damp and windy condition
D.
Cool, dry and still condition
Ans:
Hot, thy and windy condition
Explanation :
Relative humidity: As the relative humidity of the air surrounding the plant rises the transpiration rate falls. It is easier for water to evaporate into dryer air than into more saturated air. Wind and air movement: Increased movement of the air around a plant will result in a higher transpiration rate.
[9] For a healthy heart, one needs to take a balanced diet, adequate sleep and -
A.
indulge in vigorous mental activities
B.
play games like carrom, chess and cards
C.
do right amount of physical exercise
D.
do sedentary work
Ans:
do right amount of physical exercise
Explanation :
Physical activity is any form of movement that works our muscles and uses more energy than we use when resting. Walking, running, dancing, swimming, yoga and gardening are examples of physical activity. Being physically active, along with following a healthy diet and not smoking, is one of the most important things one can do to keep heart and lungs healthy. Physical activity strengthens our heart and reduces coronary heart disease risk factors.
[10] Which of the following statements is true?
A.
Dehusked cereals and pulses are more nutritious
B.
Whole grain cereals and pulses are more nutritious
C.
Processed cereal products are nutrient dense
D.
Breakfast cereals are nutrient dense
Ans:
Whole grain cereals and pulses are more nutritious
Explanation :
Cereal and pulse crops are staple foods that provide essential nutrients to many populations of the world. Traditionally, whole grains were consumed but most current foods are derived from refined fractions of cereal and pulse crops. Consumption of processed or refined, products may reduce the health benefits of food. In wheat-based processed foods, for example, the removed 40% of the grain (mainly the bran and the germ of the wheat grain) contains the majority of the health beneficial components.
[11] The main use of salt in the diet is to -
A.
increase the solubility of the food particles in water.
B.
produce in small amounts the hydrochloric acid required for the digestion of food
C.
ease the process of cooking
D.
make the taste of the food better
Ans:
produce in small amounts the hydrochloric acid required for the digestion of food
Explanation :
Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
[12] Which of the following correctly explains the phenomenon of "Test Tube Bally"?
A.
When every process of embryo formation is in the test tube.
B.
When the embryo develops in a test tube.
C.
When the fertilisation is external and development is internal.
D.
When the fertilisation is internal and development is external.
Ans:
When the fertilisation is external and development is internal.
Explanation :
Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[13] Which of the following events occurred first?
A.
DNA structure of genes was discovered by James D Watson and Francis Crick
B.
Yuri Gagarin became the first man in space
C.
World's first human heart transplant was performed by Dr. Christian Barnard
D.
World's first test tube baby Louise Brown was born in U.K.
Ans:
DNA structure of genes was discovered by James D Watson and Francis Crick
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Abscisic acid is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.
[4] Which of the following is true with reference to blood platelets?
A.
They have prominent nuclei
B.
They are involved in phagocytosis
C.
They have a pigment called haemoglobin
D.
They are also called thrombocytes
Ans:
They are also called thrombocytes
Explanation :
Platelets, also called thrombocytes, are a component of blood whose function is to stop bleeding by clumping and clotting blood vessel injuries. Unlike red and white blood cells, platelets are not actually cells but rather small fragments of cells.
[5] The second Green Revolution aims at increasing agricultural output to promote -
A.
Availability of easy credit to big farmers
B.
Co-operative farming
C.
Inclusive growth
D.
Development of rural sector
Ans:
Inclusive growth
Explanation :
In the Indian context, the Second Green Revolution is a change in agricultural production widely thought necessary to feed and sustain the growing population on Earth and promote inclusive growth. As per the Eleventh Plan document, the Second Green Revolution aims to meet the problems of small and marginal farmers for providing income security to a large section of rural households and treating them as partners of development instead of a mere beneficiary of some government schemes or programme.
[6] Food crops comprise.
A.
Cotton, Tobacco, Sugarcane
B.
Linseed, Castor, Turmeric
C.
Foodgrains, Pulses, Edible oilseeds
D.
Jute, Cotton, Chilies
Ans:
Foodgrains, Pulses, Edible oilseeds
Explanation :
Food crops are any agricultural product that can be eaten. Examples of food crops include food grains (Wheat, Rice, Maize) pulses, soybeans, sunflowers, sorghum, and edible oils (mustard, sunflower, etc). On the contrary, the term non food crop applies to the use of agricultural crops for uses other than human (as food) or animal consumption (as feed).
[7] Point out the incorrect pair -
A.
Green Revolution - Agricultural Development
B.
White Revolution - Dairy Development
C.
Blue Revolution - Development of Fisheries
D.
Operation Flood - Irrigation Development
Ans:
Operation Flood - Irrigation Development
Explanation :
Operation Flood, launched in 1970 is a project of the National Dairy Development Board (NDDB), which was the world's biggest dairy development program. It made India, a milk-sufficient nation, the largest milk producer in the world, surpassing the USA in 1998. Operation flood is also called White Revolution of India.
[8] Transpiration increases in -
A.
Hot, thy and windy condition
B.
Hot, damp and windy condition
C.
Cool, damp and windy condition
D.
Cool, dry and still condition
Ans:
Hot, thy and windy condition
Explanation :
Relative humidity: As the relative humidity of the air surrounding the plant rises the transpiration rate falls. It is easier for water to evaporate into dryer air than into more saturated air. Wind and air movement: Increased movement of the air around a plant will result in a higher transpiration rate.
[9] For a healthy heart, one needs to take a balanced diet, adequate sleep and -
A.
indulge in vigorous mental activities
B.
play games like carrom, chess and cards
C.
do right amount of physical exercise
D.
do sedentary work
Ans:
do right amount of physical exercise
Explanation :
Physical activity is any form of movement that works our muscles and uses more energy than we use when resting. Walking, running, dancing, swimming, yoga and gardening are examples of physical activity. Being physically active, along with following a healthy diet and not smoking, is one of the most important things one can do to keep heart and lungs healthy. Physical activity strengthens our heart and reduces coronary heart disease risk factors.
[10] Which of the following statements is true?
A.
Dehusked cereals and pulses are more nutritious
B.
Whole grain cereals and pulses are more nutritious
C.
Processed cereal products are nutrient dense
D.
Breakfast cereals are nutrient dense
Ans:
Whole grain cereals and pulses are more nutritious
Explanation :
Cereal and pulse crops are staple foods that provide essential nutrients to many populations of the world. Traditionally, whole grains were consumed but most current foods are derived from refined fractions of cereal and pulse crops. Consumption of processed or refined, products may reduce the health benefits of food. In wheat-based processed foods, for example, the removed 40% of the grain (mainly the bran and the germ of the wheat grain) contains the majority of the health beneficial components.
[11] The main use of salt in the diet is to -
A.
increase the solubility of the food particles in water.
B.
produce in small amounts the hydrochloric acid required for the digestion of food
C.
ease the process of cooking
D.
make the taste of the food better
Ans:
produce in small amounts the hydrochloric acid required for the digestion of food
Explanation :
Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
[12] Which of the following correctly explains the phenomenon of "Test Tube Bally"?
A.
When every process of embryo formation is in the test tube.
B.
When the embryo develops in a test tube.
C.
When the fertilisation is external and development is internal.
D.
When the fertilisation is internal and development is external.
Ans:
When the fertilisation is external and development is internal.
Explanation :
Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[13] Which of the following events occurred first?
A.
DNA structure of genes was discovered by James D Watson and Francis Crick
B.
Yuri Gagarin became the first man in space
C.
World's first human heart transplant was performed by Dr. Christian Barnard
D.
World's first test tube baby Louise Brown was born in U.K.
Ans:
DNA structure of genes was discovered by James D Watson and Francis Crick
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
In the Indian context, the Second Green Revolution is a change in agricultural production widely thought necessary to feed and sustain the growing population on Earth and promote inclusive growth. As per the Eleventh Plan document, the Second Green Revolution aims to meet the problems of small and marginal farmers for providing income security to a large section of rural households and treating them as partners of development instead of a mere beneficiary of some government schemes or programme.
[6] Food crops comprise.
A.
Cotton, Tobacco, Sugarcane
B.
Linseed, Castor, Turmeric
C.
Foodgrains, Pulses, Edible oilseeds
D.
Jute, Cotton, Chilies
Ans:
Foodgrains, Pulses, Edible oilseeds
Explanation :
Food crops are any agricultural product that can be eaten. Examples of food crops include food grains (Wheat, Rice, Maize) pulses, soybeans, sunflowers, sorghum, and edible oils (mustard, sunflower, etc). On the contrary, the term non food crop applies to the use of agricultural crops for uses other than human (as food) or animal consumption (as feed).
[7] Point out the incorrect pair -
A.
Green Revolution - Agricultural Development
B.
White Revolution - Dairy Development
C.
Blue Revolution - Development of Fisheries
D.
Operation Flood - Irrigation Development
Ans:
Operation Flood - Irrigation Development
Explanation :
Operation Flood, launched in 1970 is a project of the National Dairy Development Board (NDDB), which was the world's biggest dairy development program. It made India, a milk-sufficient nation, the largest milk producer in the world, surpassing the USA in 1998. Operation flood is also called White Revolution of India.
[8] Transpiration increases in -
A.
Hot, thy and windy condition
B.
Hot, damp and windy condition
C.
Cool, damp and windy condition
D.
Cool, dry and still condition
Ans:
Hot, thy and windy condition
Explanation :
Relative humidity: As the relative humidity of the air surrounding the plant rises the transpiration rate falls. It is easier for water to evaporate into dryer air than into more saturated air. Wind and air movement: Increased movement of the air around a plant will result in a higher transpiration rate.
[9] For a healthy heart, one needs to take a balanced diet, adequate sleep and -
A.
indulge in vigorous mental activities
B.
play games like carrom, chess and cards
C.
do right amount of physical exercise
D.
do sedentary work
Ans:
do right amount of physical exercise
Explanation :
Physical activity is any form of movement that works our muscles and uses more energy than we use when resting. Walking, running, dancing, swimming, yoga and gardening are examples of physical activity. Being physically active, along with following a healthy diet and not smoking, is one of the most important things one can do to keep heart and lungs healthy. Physical activity strengthens our heart and reduces coronary heart disease risk factors.
[10] Which of the following statements is true?
A.
Dehusked cereals and pulses are more nutritious
B.
Whole grain cereals and pulses are more nutritious
C.
Processed cereal products are nutrient dense
D.
Breakfast cereals are nutrient dense
Ans:
Whole grain cereals and pulses are more nutritious
Explanation :
Cereal and pulse crops are staple foods that provide essential nutrients to many populations of the world. Traditionally, whole grains were consumed but most current foods are derived from refined fractions of cereal and pulse crops. Consumption of processed or refined, products may reduce the health benefits of food. In wheat-based processed foods, for example, the removed 40% of the grain (mainly the bran and the germ of the wheat grain) contains the majority of the health beneficial components.
[11] The main use of salt in the diet is to -
A.
increase the solubility of the food particles in water.
B.
produce in small amounts the hydrochloric acid required for the digestion of food
C.
ease the process of cooking
D.
make the taste of the food better
Ans:
produce in small amounts the hydrochloric acid required for the digestion of food
Explanation :
Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
[12] Which of the following correctly explains the phenomenon of "Test Tube Bally"?
A.
When every process of embryo formation is in the test tube.
B.
When the embryo develops in a test tube.
C.
When the fertilisation is external and development is internal.
D.
When the fertilisation is internal and development is external.
Ans:
When the fertilisation is external and development is internal.
Explanation :
Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[13] Which of the following events occurred first?
A.
DNA structure of genes was discovered by James D Watson and Francis Crick
B.
Yuri Gagarin became the first man in space
C.
World's first human heart transplant was performed by Dr. Christian Barnard
D.
World's first test tube baby Louise Brown was born in U.K.
Ans:
DNA structure of genes was discovered by James D Watson and Francis Crick
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Operation Flood, launched in 1970 is a project of the National Dairy Development Board (NDDB), which was the world's biggest dairy development program. It made India, a milk-sufficient nation, the largest milk producer in the world, surpassing the USA in 1998. Operation flood is also called White Revolution of India.
[8] Transpiration increases in -
A.
Hot, thy and windy condition
B.
Hot, damp and windy condition
C.
Cool, damp and windy condition
D.
Cool, dry and still condition
Ans:
Hot, thy and windy condition
Explanation :
Relative humidity: As the relative humidity of the air surrounding the plant rises the transpiration rate falls. It is easier for water to evaporate into dryer air than into more saturated air. Wind and air movement: Increased movement of the air around a plant will result in a higher transpiration rate.
[9] For a healthy heart, one needs to take a balanced diet, adequate sleep and -
A.
indulge in vigorous mental activities
B.
play games like carrom, chess and cards
C.
do right amount of physical exercise
D.
do sedentary work
Ans:
do right amount of physical exercise
Explanation :
Physical activity is any form of movement that works our muscles and uses more energy than we use when resting. Walking, running, dancing, swimming, yoga and gardening are examples of physical activity. Being physically active, along with following a healthy diet and not smoking, is one of the most important things one can do to keep heart and lungs healthy. Physical activity strengthens our heart and reduces coronary heart disease risk factors.
[10] Which of the following statements is true?
A.
Dehusked cereals and pulses are more nutritious
B.
Whole grain cereals and pulses are more nutritious
C.
Processed cereal products are nutrient dense
D.
Breakfast cereals are nutrient dense
Ans:
Whole grain cereals and pulses are more nutritious
Explanation :
Cereal and pulse crops are staple foods that provide essential nutrients to many populations of the world. Traditionally, whole grains were consumed but most current foods are derived from refined fractions of cereal and pulse crops. Consumption of processed or refined, products may reduce the health benefits of food. In wheat-based processed foods, for example, the removed 40% of the grain (mainly the bran and the germ of the wheat grain) contains the majority of the health beneficial components.
[11] The main use of salt in the diet is to -
A.
increase the solubility of the food particles in water.
B.
produce in small amounts the hydrochloric acid required for the digestion of food
C.
ease the process of cooking
D.
make the taste of the food better
Ans:
produce in small amounts the hydrochloric acid required for the digestion of food
Explanation :
Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
[12] Which of the following correctly explains the phenomenon of "Test Tube Bally"?
A.
When every process of embryo formation is in the test tube.
B.
When the embryo develops in a test tube.
C.
When the fertilisation is external and development is internal.
D.
When the fertilisation is internal and development is external.
Ans:
When the fertilisation is external and development is internal.
Explanation :
Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[13] Which of the following events occurred first?
A.
DNA structure of genes was discovered by James D Watson and Francis Crick
B.
Yuri Gagarin became the first man in space
C.
World's first human heart transplant was performed by Dr. Christian Barnard
D.
World's first test tube baby Louise Brown was born in U.K.
Ans:
DNA structure of genes was discovered by James D Watson and Francis Crick
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Physical activity is any form of movement that works our muscles and uses more energy than we use when resting. Walking, running, dancing, swimming, yoga and gardening are examples of physical activity. Being physically active, along with following a healthy diet and not smoking, is one of the most important things one can do to keep heart and lungs healthy. Physical activity strengthens our heart and reduces coronary heart disease risk factors.
[10] Which of the following statements is true?
A.
Dehusked cereals and pulses are more nutritious
B.
Whole grain cereals and pulses are more nutritious
C.
Processed cereal products are nutrient dense
D.
Breakfast cereals are nutrient dense
Ans:
Whole grain cereals and pulses are more nutritious
Explanation :
Cereal and pulse crops are staple foods that provide essential nutrients to many populations of the world. Traditionally, whole grains were consumed but most current foods are derived from refined fractions of cereal and pulse crops. Consumption of processed or refined, products may reduce the health benefits of food. In wheat-based processed foods, for example, the removed 40% of the grain (mainly the bran and the germ of the wheat grain) contains the majority of the health beneficial components.
[11] The main use of salt in the diet is to -
A.
increase the solubility of the food particles in water.
B.
produce in small amounts the hydrochloric acid required for the digestion of food
C.
ease the process of cooking
D.
make the taste of the food better
Ans:
produce in small amounts the hydrochloric acid required for the digestion of food
Explanation :
Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
[12] Which of the following correctly explains the phenomenon of "Test Tube Bally"?
A.
When every process of embryo formation is in the test tube.
B.
When the embryo develops in a test tube.
C.
When the fertilisation is external and development is internal.
D.
When the fertilisation is internal and development is external.
Ans:
When the fertilisation is external and development is internal.
Explanation :
Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[13] Which of the following events occurred first?
A.
DNA structure of genes was discovered by James D Watson and Francis Crick
B.
Yuri Gagarin became the first man in space
C.
World's first human heart transplant was performed by Dr. Christian Barnard
D.
World's first test tube baby Louise Brown was born in U.K.
Ans:
DNA structure of genes was discovered by James D Watson and Francis Crick
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
[12] Which of the following correctly explains the phenomenon of "Test Tube Bally"?
A.
When every process of embryo formation is in the test tube.
B.
When the embryo develops in a test tube.
C.
When the fertilisation is external and development is internal.
D.
When the fertilisation is internal and development is external.
Ans:
When the fertilisation is external and development is internal.
Explanation :
Test tube baby is born from in vitro fertilization. In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in vitro. When a woman's natural cycle is monitored to collect a naturally selected ovum (egg) for fertilization, it is known as natural cycle NF. The fertilized egg (zygote) is then transferred to the patient's uterus with the intention of establishing a successful pregnancy.
[13] Which of the following events occurred first?
A.
DNA structure of genes was discovered by James D Watson and Francis Crick
B.
Yuri Gagarin became the first man in space
C.
World's first human heart transplant was performed by Dr. Christian Barnard
D.
World's first test tube baby Louise Brown was born in U.K.
Ans:
DNA structure of genes was discovered by James D Watson and Francis Crick
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Discovery of DNA structure of genes: 25 April, 1953; Yuri Gagarin's feat of becoming the first man in space: 12 April, 1961; World's first human heart transplant: 3 December, 1967; and World's first test tube baby: 25 July, 1978.
[14] Identify the correct statement with respect to Biogas.
A.
Mixture of gases from volcanoes
B.
Gas produced from certain crude oil wells
C.
Gas produced by incomplete combustion of biomass
D.
Gas produced by fermentertian of biomass
Ans:
Gas produced by fermentertian of biomass
Explanation :
Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.
[15] Heart attack occurs due to -
A.
Bacterial attack on the heart
B.
Stopping of heart beat
C.
Lack of supply of blood to the heart itself
D.
Impairment of heart's working due to unknown reasons
Ans:
Lack of supply of blood to the heart itself
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
A heart attack occurs when blood flow to a part of your heart is blocked for a long enough time that part of the heart, muscle is damaged or dies. The medical term for this is myocardial infarction. Most heart attacks are caused by a blood clot that blocks one of the coronary arteries. The coronary arteries bring blood and oxygen to the heart. If the blood flow is blocked, the heart is starved of oxygen and heart cells die.
[16] 'Green House Effect' means -
A.
cultivation of crops in green house to conserve heat
B.
trapping of solar energy due to carbon dioxide gases
C.
trapping of solar energy by earth upper surface
D.
increase of heat due to atmospheric pollution
Ans:
trapping of solar energy due to carbon dioxide gases
Explanation :
Green House Effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases and is re-radiated in all directions.
[17] Fat present below the skin surface in our body acts as a barrier against -
A.
loss of heat from the body
B.
loss of essential body fluids
C.
loss of salt from the body
D.
entry of harmful micro-organisms from the environment
Ans:
loss of heat from the body
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.
[18] Xylem fibres are made up of -
A.
Scierenchyma cells with thin walls
B.
Scierenchyma cells with thick walls
C.
Parenchyma cells with thin walls
D.
Scierenchyma cells with no obliteration in central lumen
Ans:
Scierenchyma cells with thick walls
Explanation :
Fibre that occurs as element of Xylem is called Xylem fibre. It is also referred to as Xylary fibre and wood fibre. It is made up of Scierenchyma cells with thick walls.
[19] Which of the following item is not included in Environmental Auditing?
A.
Pollution monitoring schemes
B.
Scrutiny by the government agencies
C.
Safety provisions for industrial workers
D.
Storage of toxic chemicals
Ans:
Scrutiny by the government agencies
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Scrutiny by the Government agencies is not included in the Environmental Auditing.
[20] Membrane lipids of chill-sensitive plants contain -
A.
low proportion of saturated fatty acids.
B.
low proportion of unsaturated fatty acids.
C.
equal proportion of saturated and unsaturated fatty acids.
D.
high proportion of unsaturated fatty acids.
Ans:
high proportion of unsaturated fatty acids.
Explanation :
The membranes of chill sensitive plants have been found to have about a 2:1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases when chill-sensitive plants are acclimated to a low temperature.
[21] Natural organic fertilizers are found to be better then chemical fertilizers because -
A.
chemical fertilizers are less productive
B.
organic fertilizers are more productive
C.
organic fertilizers sustain soil productivity
D.
chemical fertilizers are toxic
Ans:
organic fertilizers sustain soil productivity
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Organic fertilizers like compost are either soil conditioners or growth enhancers. They sustain crop yields and soil productivity in intensive cropping systems which leave low organic residues on the soil.
[22] Select the High Yielding Varieties of seed-crops developed under Green Revolution in India.
A.
Rice, Wheat, Pulses, Oil seeds and Sugarcane
B.
Maize, Black-gram, Jowar, Coffee arid Tea
C.
Rice, Wheat, Jowar, Bajra, and Maize
D.
Wheat, Rice, Sugarcane, Pulses and Maize
Ans:
Rice, Wheat, Pulses, Oil seeds and Sugarcane
Explanation :
The growth rates of area, production and yield of food grains in India can be divided into two broad periods the period 1949-50 to 1964-65, signifying the pre-green revolution period, and then after omitting two drought years 1965-66 and 1966-67, the second period of 1967-68 to 1996-97 represents the post green revolution period. The main impact of green revolution was on wheat, as production increased by 300 percent. High Yielding Varieties of wheat, rice, pulses, oilseeds and sugarcane were development under Green Revolution in India.
[23] Among the following sets of salient features, which set does not exclusively characterize mammals?
A.
Presence of sweat, glands, hairs on skin and diphyoclonts
B.
Presence of mammary glands, sweat glands and diaphragm
C.
Presence of mammary' glands, sweat glands, and diaphragm
D.
Presence of mammary glands, hairs on skin and diaphragm.
Ans:
Presence of mammary' glands, sweat glands, and diaphragm
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
Ayes are also worm blooded and their heart is four-chambered. Crocodiles (Reptilia) also have four- chambered heart.
[24] A person with 'AB' blood group is sometimes called a universal recipient because of the -
A.
lack of antigen in his blood
B.
lack of antibodies in his blood
C.
lack of both antigens and antibodies in his blood
D.
presence of antibodies in his blood
Ans:
lack of antibodies in his blood
Explanation :
0
[25] The duration 19-21 days refers to:
A.
incubation period of hen's egg
B.
average life-span of a red blood cell in humans
C.
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
D.
period of completion of one schizogony cycle of malarial parasite inside a red blood cell
Ans:
the period of menstrual cycle soon after menstruation, during which fertilization is most likely to occur
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular
Explanation :
The menstrual cycle is the scientific term for the physiological changes that occur in fertile women and other female primates for the purposes of sexual reproduction. It takes approximately 28 days to complete although this does vary from person to person. Length variation between eight and 20 days is considered as moderately irregular cycles. Variation of 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular