Q. No.Consider the following two statements regarding the integuments of an ovule:
I:
Angiosperms are generally bitegmic and gymnosperms unitegmic.
II:
The integuments develop into the seed coat when the ovule matures after fertilization.
Of the two statements:
1. Both I and II are true
2. Both I and II are false
3. Only I is true
4. Only II is true
2. Both I and II are false
3. Only I is true
4. Only II is true
How many cells of the female gametophyte are surrounded by a cell wall and are organized into cells?
| 1. | 6 | 2. | 7 |
| 3. | 8 | 4. | 2 |
Cleistogamous flowers are:
| 1. | Mostly autogamous | 2. | Invariably autogamous |
| 3. | Mostly xenogamous | 4. | Invariably xenogamous |
Which of the following is not a character of anemophilous flowers?
1. Pollens are light and non sticky
2. Stamens are well exposed
3. Have large, often feathery stigma
4. Have multiple ovules in each ovary
The majority of water plants like water hyacinth and water lily are pollinated by:
| 1. | Water | 2. | Wind |
| 3. | Insects | 4. | Both 2 and 3 |
Majority of the flowering plants produce:
| 1. | Female flowers | 2. | Male flowers |
| 3. | Hermaphroditic flowers | 4. | Neutral flowers |
In artificial hybridization experiments, if the female plant produces unisexual flowers, emasculation:
| 1. | Must be done before maturity. |
| 2. | Must be done after maturity. |
| 3. | Must be done at maturity. |
| 4. | Is not needed. |
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. |
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. |
At what temperature pollens can be stored for years in liquid nitrogen?
| 1. | 0°C | 2. | -100°C |
| 3. | -196°C | 4. | 4°C |
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