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Q. No.
Assertion (A):
In angiosperms, the male gametophyte contains a single male gamete that unites with the egg to produce the seed.
Reason (R):
The embryosac in angiosperms has an egg apparatus that consists of only one egg cell.
1.
Both (A) and (R) are True but the (R) does not correctly explain the (A).
2.
(A) is True but (R) is False.
3.
Both (A) and (R) are True and the (R) correctly explains the (A).
4.
(A) is False but (R) is True.
Subtopic: Stamen: Male Gametophyte |
71%
From NCERT
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In an angiosperm
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: | Microspore mother cell is diploid and megaspore mother cell is haploid. |
| II: | Microsporogenesis involves meiosis and megasporogenesis involves mitosis. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Stamen: Microsporangium |
83%
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Subtopic: FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
57%
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Consider the given two statements:
| Statement I: | The majority of flowering plants produce hermaphrodite flowers. |
| Statement II: | The majority of flowering plants have a well-developed gametophyte and poorly developed sporophyte. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Post Pollination Events |
75%
From NCERT
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Consider the given two statements:
| Statement I: | Monoecy prevents autogamy but not geitonogamy. |
| Statement II: | Dioecy prevents both autogamy and geitonogamy. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Post Pollination Events |
73%
From NCERT
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In artificial hybridization experiments:
| I: | If the female parent bears bisexual flowers, removal of anthers from the flower bud before the anther dehisces using a pair of forceps is necessary. |
| II: | If the female parent produces unisexual flowers, there is no need for emasculation. |
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: Post Pollination Events |
94%
From NCERT
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Seeds offer several advantages to angiosperms including:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II, and III are correct
| I: | Seed formation is more dependable. |
| II: | They have sufficient food reserves. |
| III: | They generate new genetic combinations leading to variations. |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II, and III are correct
Subtopic: Seed |
76%
From NCERT
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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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