Q121
Open questionWhich of the following is the principal pathway by which water is translocated in the angiosperms?
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Biology GK · all questionsPlant Anatomy and Physiology
Plant Anatomy and Physiology
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Q122
Open questionThe maximum amount of water, which plants need to grow, is absorbed by the following?
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Q123
Open questionBordeux mixture, one of the very common chemotherapeutents, is a mixture of
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Q124
Open questionVernalisation can be reversed by
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Q125
Open questionThe germination of seeds within the fruit while still attached to the mother plant is known as
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Q126
Open questionThe absorption of light, with subsequent activation of the absorbing molecule, followed by aseries of chemical reactions leading to a general plant response, is termed as
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Q127
Open questionThe first use of seeds was made by
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Q128
Open questionWhich of the following is an example of chemical scarification as way of breaking dormancy resulting from the seed coat?
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Q129
Open questionThe mycelium of the fungus Colietotrichum falactum grows
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Q130
Open questionWhich of the following families has by far the largest number of species which produce seeds with hard seed coats impermeable to water?
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Q131
Open questionConsider the following statements regarding malacophyllous xerophytes and choose the correct answer:
1. Malacophyllous xerophytes are characterised by reduced stem and succulent leaves
2. Succulent leaves are usually large in size and are often more or less circular in shape
3. Succulent leaves possess prominent water storage tissue consisting of thin-walled parenchymatous cells
4. The amount of chlorophyll gradually increases from periphery to the centre in the leave
1. Malacophyllous xerophytes are characterised by reduced stem and succulent leaves
2. Succulent leaves are usually large in size and are often more or less circular in shape
3. Succulent leaves possess prominent water storage tissue consisting of thin-walled parenchymatous cells
4. The amount of chlorophyll gradually increases from periphery to the centre in the leave
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Q132
Open questionAccording to Stopes (1907), the xerophytism in the coniferae is due to the presence of
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Q133
Open questionOrganisms which spend most of their time on the underside of the air-water interface and obtain much of their food from within water are termed
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Q134
Open questionThe pyramid of biomass may be inverted in case of
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Q135
Open questionDuring anaerobic respiration, carbon dioxide evolution takes place without any oxygen uptake, giving an RQ to
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Q136
Open questionRhizobium fixes atmospheric nitrogen to ammonia in the presence of the red pigment called
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Q137
Open questionThe most extensive and common method of reproduction in runners, stolons, stem and root tubers, dormant apices, offsets etc., is
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Q138
Open questionMatch List-I with List-II and select the correct answer:
| List-I (Diseases) | List-II (Symptoms) |
| a. Blights | 1. Sudden death of blossoms, young leaves and twigs, usually before they are fully developed |
| b. Pustules | 2. Failure of chlorophyll development caused by mineral deficiencies |
| c. Chlorosis | 3. Unequal development of chlorophyll in different parts of a leaf, caused chiefly by viruses |
| d. Mosaics | 4. Blisters, formed by the rupture of the surface tissues of a host by spore masses or fruiting bodies of patbogenic fungi |
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Q139
Open questionThe exoenzymes secreted by the cell in inactive from are known as
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Q140
Open questionWho among the following defined conservation "as the process which is concerned with the use, preservation, and proper management of the natural resources of the earth and their protection from destructive influences, misuse, decay, fire or waste"?
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