1. | 7 celled and 8 nucleate |
2. | 8 celled and 7 nucleate |
3. | 7 celled and 7 nucleate |
4. | 8 celled and 8 nucleate |
1. | Typical angiosperm anther is bilobed and dithecous. |
2. | Tapetum in the wall of the anther nourishes the developing pollen grains. |
3. | In over 60 % of angiosperms, pollen grains are shed at the three-celled stage. |
4. | Pollen exine is made up of sporopollenin. |
Nucellar polyembryony is seen in:
1. Citrus and Mango
2. Castor and Pea
3. Grasses and Mustard
4. Orchids and China rose
Wind-pollinated flowers are characterized by:
1. | being heavily scented |
2. | highly attractive colours |
3. | non-sticky light pollen grains, well-exposed stamen, large feathery stigma |
4. | ribbon shaped pollen with mucilaginous covering |
1. | Moths and butterflies are the most dominant pollinating agents among insects |
2. | Pollination by water is quite rare in flowering plants |
3. | Pollination by wind is more common amongst abiotic pollination |
4. | Flowers produce foul odours to attract flies and beetles to get pollinated |
Given below are two statements:
Statement I: | Cleistogamous flowers are invariably autogamous. |
Statement II: | Cleistogamy is disadvantageous as there is no chance for cross pollination. |
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Which part of the fruit, labelled in the given figure makes it a false fruit?
1. D-Seed
2. A-Mesocarp
3. B-Endocarp
4. C-Thalamus