Q421
Open questionWhich among the following elements increases the absorption of water and calcium in plants?
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Biology GK · all questionsPlant Anatomy and Physiology
Plant Anatomy and Physiology
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Q422
Open questionCoenzymes, however, differ from enzymes in that
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Q423
Open questionConsider the following statements and choose the correct answer:
1. A direct proportionality exists between vapour pressure and the concentration of water vapour in the atmosphere
2. Relative humidity is an expression of the ratio of the actual vapour pressure of the atmosphere when saturated at the same temperature
3. A rise or fall in temperature with no change in vapour pressure will cause a drop or rise, respectively, in relative humidity
4. A rise or fall in vapour pressure with no change in temperature will be accompanied by a rise or fall, respectively, in relative humidity
1. A direct proportionality exists between vapour pressure and the concentration of water vapour in the atmosphere
2. Relative humidity is an expression of the ratio of the actual vapour pressure of the atmosphere when saturated at the same temperature
3. A rise or fall in temperature with no change in vapour pressure will cause a drop or rise, respectively, in relative humidity
4. A rise or fall in vapour pressure with no change in temperature will be accompanied by a rise or fall, respectively, in relative humidity
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Q424
Open questionThe sexual reproduction taking place by the fusion of haploid male and female gametes is known as
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Q425
Open questionWilting of plants occurs due to excessive
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Q426
Open questionWhich of the following is a characteristic of permanent tissue?
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Q427
Open questionPositive interactions, where populations help one another, the interaction being either one-way or reciprocal include
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Q428
Open questionThe cytochromes are conjugated proteins consisting of
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Q429
Open questionThe establishment and final maturation of colonising species is known as
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Q430
Open questionGagnepain and Boureau (1946, 1947) included Exocarpus among Gymnosperms and placed it in a separate family Exocarpaceae near Taxaceae, on the basis of which of the following features?
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Q431
Open questionThe respiratory quotient of succulents is
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Q432
Open questionMatch List-I (Climatic region) with List-II (Annual rainfall) and select the correct answer:
| List-I | List-II |
| a. Wet zone | 1. 20 - 40 inches |
| b. Intermediate zone | 2. Less than 20 inches |
| c. Dry zone | 3. 40 - 80 inches |
| d. Arid zone | 4. More than 80 inches |
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Q433
Open questionAn insect-catching plant is
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Q434
Open questionPlants release energy during
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Q435
Open questionThe gas used for artificial ripening of green fruit is
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Q436
Open questionConsider the following statements regarding the importance of imbibition to the plants and choose the correct answer:
1. Imbibition causes swelling of seeds and results in the breaking of testa
2. The water moves into ovules which are ripening into seeds by the process of imbibition
3. Imbibition pressure generated during germination of seeds and spores is so enormous that it can break asphalt road and concrete pavements
1. Imbibition causes swelling of seeds and results in the breaking of testa
2. The water moves into ovules which are ripening into seeds by the process of imbibition
3. Imbibition pressure generated during germination of seeds and spores is so enormous that it can break asphalt road and concrete pavements
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Q437
Open questionWhich of the following is a man-made ecosystem?
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Q438
Open questionIn the absence of oxygen during glycolysis, pyruvic acid is converted into
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Q439
Open questionOf the numerous promoters of germination known, the most popular and widely used promoters include
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Q440
Open questionThe process by which newly formed enzymes are labelled with a heavy isotope is known as
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