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. |
A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
Statement I: | The bilobed nature of an anther is very distinct in the given section. |
Statement II: | The anther is a two-sided [bigonal] structure consisting of four microsporangia located at the corners, two in each lobe. |
1. | Statement I is correct, Statement II is correct. |
2. | Statement I is incorrect, Statement II is correct. |
3. | Statement I is correct, Statement II is incorrect. |
4. | Statement I is incorrect, Statement II is incorrect. |
Tapetum:
1. | is the outermost layer in the wall of microsporangium |
2. | helps in the protection of the pollen grains |
3. | helps in dehiscence of anther |
4. | has cells that generally have more than one nucleus |
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 |