Assertion (A): | A typical unfertilised, angiosperm embryo sac at maturity is 8-nucleate and 7-celled. |
Reason (R): | The egg apparatus has 2 polar nuclei. |
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True. |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
4. | Both (A) and (R) are true but (R) is not the correct explanation of (A) |
Assertion (A): | Both wind and water pollinated flowers are not very colourful and do not produce nectar. |
Reason (R): | The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. |
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True. |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
Assertion (A): | Cells of the tapetum possess dense cytoplasm and generally have more the one nucleus. |
Reason (R): | Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells. |
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True. |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
A: | The flowers of Vallisneria are colourful and produce nectar. |
B: | The flowers of waterlily are not pollinated by water. |
C: | In most of water-pollinated species, the pollen grains are protected from wetting. |
D: | Pollen grains of some hydrophytes are long and ribbon like. |
E: | In some hydrophytes, the pollen grains are carried passively inside water. |
1. | Water pollinated flowers showing stamens with mucilaginous covering. |
2. | Cleistogamous flowers showing autogamy. |
3. | Compact inflorescence showing complete autogamy. |
4. | Wind pollinated plant inflorescence showing flowers with well exposed stamens. |
1. | Nucellus | 2. | Integument |
3. | Chalaza | 4. | Hilum |
1. | Amensalism | 2. | Anemophily |
3. | Floral reward | 4. | Commensalism |
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 456849
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 456849