The majority of water plants like water hyacinth and water lily are pollinated by:
1. | Water | 2. | Wind |
3. | Insects | 4. | Both 2 and 3 |
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Consider the following statements regarding floral primordium:
I: | It is formed at the shoot apical meristem |
II: | The development of flowers is dependent on genetics, PGR, and environmental conditions. |
Of the two statements:
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect. |
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At what temperature pollens can be stored for years in liquid nitrogen?
1. | 0°C | 2. | -100°C |
3. | -196°C | 4. | 4°C |
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In angiosperms, the mature female gametophyte is represented by:
1. | Nucellus | 2. | Megaspore |
3. | MMC | 4. | Embryosac |
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A typical angiosperm embryosac, at maturity, is:
1. | 8 celled and 8 nucleate | 2. | 8 celled and 7 nucleate |
3. | 7 celled and 8 nucleate | 4. | 7 celled and 7 nucleate |
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Chasmocleistogamy [Amphicarpy] is not seen in:
1. | Viola [Common pansy] | 2. | Oxalis |
3. | Pisum sativum | 4. | Commelina |
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The dominating pollinating agent of flowering plants amongst animals are:
1. | Arboreal mammals | 2. | Insects |
3. | Birds | 4. | Reptiles |
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A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
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What is true about the vegetative cell in the pollen tube?
1. | It is smaller than the generative cell |
2. | It has an irregular shaped nucleus |
3. | It floats in the cytoplasm of the generative cell |
4. | It has a dense cytoplasm lacking food reserves |
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In a multicarpellary syncarpous ovary:
1. | There is more than one pistil that is fused with the other |
2. | There is more than one pistil that is free from each other |
3. | There is one pistil that is fused with the stamen |
4. | There is more than one pistil that is fused with the stamen |
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