The number of mitotic generations required to form a mature embryo sac from megaspore in most of the flowering plants is
1. One
2. Two
3. Three
4. Four
Hydrophily is limited to 30 genera which are mostly
1. Gymnosperms
2. Monocots
3. Dicots
4. More than one option is correct
Pollen pistil interaction is
1. Chemically mediated process
2. Dynamic process
3. Genetically controlled process
4. More than one option is correct
Examine the figure given below and select the right option giving all the four parts a,b,c and d. Correctly identify
a | b | c | d | |
1. | Endo- thecium |
Tapetum | Micro- spore mother cell |
Middle layer |
2. | Tapetum | Endo- thecium |
Micro- spore mother cell |
Middle layer |
3. | Endo- thecium |
Middle layer |
Tapetum | Micro- spore mother cell |
4. | Endo- thecium |
Micro- spore mother cell |
Middle layer |
Tapetum |
A pollen tube liberates male gametes into
1. Degenerating synergid
2. Intact synergid
3. Antipodals
4. Egg
What functions as the embryonic root of the plant?
1. A
2. B
3. C
4. D
Choose the correct option with respect to the function of the germ pore.
1. It allows growth of pollen tube
2. It allows water absorption in seed
3. It helps dehiscence of pollen grain
4. More than one option is correct
The pollen grain represents
1. Male gamete
2. Male gametophyte
3. Microsporophyll
4. Microsporangium
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?
1. | Ovules develop into an embryo sac |
2. | Ovary develops into fruit |
3. | Zygote develops into an embryo |
4. | Central cell develops into endosperm |
What is the fate of the male gametes discharged in the synergid?
1. | One fuses with the egg and the other fuses with central cell nuclei |
2. | One fuses with the egg and the other(s) degenerate(s) in the synergid |
3. | All fuse with the egg |
4. | One fuses with the egg and the other(s) fuse(s) with a synergid nucleus |