- 1(current)
Q. No.The germ pore in the pollen wall:
| 1. | is an aperture in the pollen intine that allows the pollen tube to exit. |
| 2. | is the name of the nucleus of the microspore mother cell. |
| 3. | is formed where sporopollenin is located in the exine. |
| 4. | is an aperture in the pollen exine that allows the pollen tube to exit. |
The correct sequence of layers in the wall of an anther from outside to inside is:
| 1. | Tapetum – Middle Layers – Endothecium – Epidermis |
| 2. | Epidermis – Endothecium – Tapetum – Middle layers |
| 3. | Epidermis – Endothecium – Middle layers – Tapetum |
| 4. | Tapetum – Endothecium – Middle layers – Epidermis |
The outermost and innermost wall layers of microsporangium in an anther are respectively:
1. Endothecium and tapetum
2. Epidermis and endodermis
3. Epidermis and middle layer
4. Epidermis and tapetum
Match each item in Column I with one in Column II and select the correct answer from the codes given:
|
A. |
Pollen exine |
P. |
Cellulose and pectin |
|
B. |
Pollen intine |
Q. |
Sporopollenin |
|
C. |
Antipodals |
R. |
Nutrition to the embryo sac |
|
D. |
Synergids |
S. |
Pollen tube guidance |
|
A. |
B. |
C. |
D. |
|
|
1. |
P |
Q |
R |
S |
|
2. |
Q |
P |
S |
R |
|
3. |
Q |
P |
R |
S |
|
4. |
P |
Q |
S |
R |
| I: | Each anther develops four microsporangia |
| II: | Each microspore mother cell undergoes meiosis and produces four haploid microspores |
| III: | Each microspore gives rise to a male gametophyte |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
In the given diagram showing T.S. of a typical angiosperm anther, the cells of which part are most likely to undergo mitosis, that is not normal, due to which many of them become bi or multinucleate?
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
- 1(current)
Q. No.
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