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Q. No.Consider the given two statements:
Assertion (A):
The innermost layer of the wall of microsporangium is critical for the pollen grains in angiosperms.
Reason (R):
Cells of this layer possess dense cytoplasm and generally have more than one nucleus.
1.
Both (A) and (R) are True and (R) correctly explains (A).
2.
Both (A) and (R) are True but (R) does not correctly explain (A).
3.
(A) is True; (R) is False
4.
Both (A) and (R) are False
Subtopic: Stamen: Microsporangium |
55%
From NCERT
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Consider the given two statements:
| Assertion (A): | In majority of the flowering plants, the method of embryo sac formation is called as monosporic development. |
| Reason (R): | In majority of the flowering plants, one of the megaspores is functional while the other three degenerate. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
88%
From NCERT
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Parthenium hysterophorus:
1. I, II, III and IV are correct
2. Only I, II, and III are correct
3. Only I, III and IV are correct
4. Only II, III and IV are correct
| I: | is also called carrot grass. |
| II: | came to India as a contaminant with imported rice. |
| III: | has become invasive in India. |
| IV: | causes pollen allergy. |
1. I, II, III and IV are correct
2. Only I, II, and III are correct
3. Only I, III and IV are correct
4. Only II, III and IV are correct
Subtopic: Stamen: Male Gametophyte |
69%
From NCERT
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How many of the given statements are correct?
| I: | Pollens of wheat and rice remain viable for months. |
| II: | Pollens of plants of Rosaceae family lose viability within 30 minutes. |
| III: | The number of ovules in the ovary of wheat, paddy and mango is one. |
| IV: | There are many ovules in the ovary of papaya, watermelon and orchids. |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
Subtopic: Stamen: Male Gametophyte |
79%
From NCERT
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The number of successive mitotic division(s) that the functional megaspore undergoes to produce the
embryo sac in angiosperms is:
embryo sac in angiosperms is:
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
Subtopic: Pistil: Female Gametophyte |
79%
From NCERT
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Consider the given two statements:
| Assertion (A): | Apomixis is a form of asexual reproduction that mimics sexual reproduction. |
| Reason (R): | Apomicts do not produce seeds. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Apomixis & Polyembryony |
72%
From NCERT
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In coconut:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The fruit is a drupe. |
| II: | The white kerne is cellular endosperm. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Endosperm |
87%
From NCERT
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Water:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | is one of the two abiotic agents used for pollination by certain angiosperms. |
| II: | is used by majority of aquatic plants for pollination. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Pollination & Outbreeding Devices |
61%
From NCERT
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Cryopreservation is a technique that involves storing biological material in liquid nitrogen at:
1. 0°C
2. - 4°C
3. -100°C
4. -196°C
1. 0°C
2. - 4°C
3. -100°C
4. -196°C
Subtopic: Stamen: Male Gametophyte |
97%
From NCERT
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A syncarpus gynoecium has:
1. a single pistil
2. no pistils
3. multiple free pistils
4. more than one fused pistils
1. a single pistil
2. no pistils
3. multiple free pistils
4. more than one fused pistils
Subtopic: Pistil: Ovule |
88%
From NCERT
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