Q201
Open questionFor the protection from toxic effects of molecula O2, cells possess the cellular organelles called
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Biology GK · all questionsPlant Anatomy and Physiology
Plant Anatomy and Physiology
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Q202
Open questionDrought enduring plants like species of Acacia are
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Q203
Open questionThe lichens, mycorrhizae and nitrogen fixing organisms have been classified under
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Q204
Open questionFirst compound which is fixed during photosynthesis is
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Q205
Open questionWith reference to the movement of molecules of fluid in plant, consider the following statements.
1. Diffusion is the movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration.
2. Osmosis is a process in which the water molecules move through a semipermeable membrane from the region of their lower concentration to the region of their higher concentration.
Which of the statement(s) given above is/are correct ?
1. Diffusion is the movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration.
2. Osmosis is a process in which the water molecules move through a semipermeable membrane from the region of their lower concentration to the region of their higher concentration.
Which of the statement(s) given above is/are correct ?
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Q206
Open questionPlants contain a variety of sterols like stigmasterol, ergosterol, sitosterol etc which very closely resemble cholesterol. These plant sterols are referred as
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Q207
Open questionAssertion (A) Reproduction is the process by which living organisms produce young ones of their species.
Reason (R) Sex organs, male and female, are mandatory for reproduction.
Reason (R) Sex organs, male and female, are mandatory for reproduction.
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Q208
Open questionWhich of the following pair represent the Correct pair of reproductive parts of a flower?
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Q209
Open questionConsider the following statements regarding double fertilization and choose the correct answer:
1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball
2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg
3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei
4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo
1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball
2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg
3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei
4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo
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Q210
Open questionConsider the following statements and choose the correct answer:
1. Evaporation is a vital physiological process
2. Transpiration is restricted to living bodies only
3. Evaporation is as low loss of water molecules to the unsaturated atmosphere from the free exposed surface among living and non-living bodies
4. Transpiration is simply a loss of water molecules which do not involve any pressure
1. Evaporation is a vital physiological process
2. Transpiration is restricted to living bodies only
3. Evaporation is as low loss of water molecules to the unsaturated atmosphere from the free exposed surface among living and non-living bodies
4. Transpiration is simply a loss of water molecules which do not involve any pressure
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Q211
Open questionGrowth movement with fluxes in its rate due to varying rates of growth on different sides of the organ is known as
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Q212
Open questionMatch List-I (Pollutants) with List-II (Sources) and select the correct answer:
| List-I | List-II |
| a. Petroleum and industrial hydrocarbons | 1. Vehicles |
| b. Airborne lead | 2. Offshore wells, oil tankers, industrial wastes |
| c. Mercury | 3. Plastic industries |
| d. Polychlorinated biphenols | 4. Industrial operations |
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Q213
Open questionWhich of the following diseases is externally seed borne and perennates through the smut spores which adhere to the healthy grains during threshing time?
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Q214
Open questionWhich of the following are non-renewable resources?
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Q215
Open questionAn action spectrum for the effectiveness of different wave lengths of light demonstrates that the most efficient wave lengths for inhibition of flowering are found between
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Q216
Open questionTo study meiosis in plants, the best part would be
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Q217
Open questionCell becomes turgid because of
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Q218
Open questionWho among the following defines root pressure "as a pressure developing in the tracheary elements of the xylem as a result of the metabolic activities of roots"?
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Q219
Open questionWhen the escape of water takes place from the tips or margins of the uninjured leaves in the vicinity of the mid veins or veinlets, it is called
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Q220
Open questionThe complete conversion of glucose, in the presence of oxygen, into carbon dioxide and water with release of energy is called
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