The phenomenon wherein, the ovary develops into a fruit without fertilisation is called:
1. | Parthenocarpy | 2. | Apomixis |
3. | Asexual reproduction | 4. | Sexual reproduction |
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Pollen grains lose viability within 30 minutes of their release in some members of:
1. | Rosaceae | 2. | Leguminosae |
3. | Poaceae | 4. | Solanaceae |
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Consider the following two statements regarding the integuments of an ovule:
I: | Angiosperms are generally bitegmic and gymnosperms unitegmic |
II: | The integuments develop into the seed coat when the ovule matures after fertilization. |
Of the two statements:
1. Both I and II are true
2. Both I and II are false
3. Only I is true
4. Only II is true
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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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