Q361
Open questionThe endosperm consists of a mass of starch-laden cells surrounded by a layer of cells called the
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Q362
Open questionWhich of the following organisms, in 1943, caused the 'Bengal famine' in which several lacs of people died of starvation?
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Q363
Open questionWho among the following is regarded as the founder of Mycology and Plant Pathology in India?
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Q364
Open questionWhich of the following resources generally remain unaltered and are often termed as 'unalterable resources'?
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Q365
Open questionInhibition of photosynthesis by high O2 level was termed as
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Q366
Open questionWhich of the following naturally occuring carotenes is symmetrical?
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Q367
Open questionThe efficiency of energy conversion in plants is equal to
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Q368
Open questionAccording to Blackman (1928), the carbon conservation by oxygen in the Pasteur effect was due to some synthetic reaction termed
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Q369
Open questionThe phenomenon in which different plant parts like stem, fruit-stalks, valves of fruits, bracts etc, are closely curled towards one another when dry but open apart when moistened is known as
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Q370
Open questionIn which of the following plants the synergids become egg like and may be fertilized by sperms from an additional pollen tube?
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Q371
Open questionA free biradical is almost always produced when
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Q372
Open questionThe nucellus of ovule is surrounded by one or two cellular coats called
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Q373
Open questionWhen reaction proceeds from one direction to another they have to overcome an energy barrier called the
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Q374
Open questionMatch List-I with List-II and select the correct answer:
| List-I | List-II |
| a. Nitrogen | 1. Structural element |
| b. Iron | 2. Biocatalytical element |
| c. Molybdenum | 3. Indispensable element |
| d. Iodine | 4. Stimulating element |
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Q375
Open questionA grain of maize is infact a dry one-seeded indehiscent fruit of
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Q376
Open questionRhizobia are known to produce the plant hormone
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Q377
Open questionWho among the following considered climax vegetation "as a pattern of populations corresponding to the pattern of environmental gradients"?
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Q378
Open questionConsider the following statements.
1. Carbon dioxide, chlorophyll and sunlight all are essential for photosynthesis.
2. Rate of photosynthesis is maximum in red light and minimum in green light.
3. Increase in O2 concentration decrease photosynthesis.
Which of the statements given above is/are correct about photosynthesis ?
1. Carbon dioxide, chlorophyll and sunlight all are essential for photosynthesis.
2. Rate of photosynthesis is maximum in red light and minimum in green light.
3. Increase in O2 concentration decrease photosynthesis.
Which of the statements given above is/are correct about photosynthesis ?
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Q379
Open questionWhich of the following is an example of bound auxin?
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Q380
Open questionThere is extreme reduction in roots and analogous organs; some are rootless, when roots are present, they are without root hairs because water and nutrient salts may be absorbed by the entire permeable plant surface under water. These adaptations belong to
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