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Q. No.Discovered during the archeological excavation at King Herod’s palace near the Dead Sea, a 2000 years old viable seed is of:
1.
Phoenix dactylifera
2.
Arabidopsis thaliana
3.
Lupinus arcticus
4.
Melandrium album
Subtopic: Monocarpic & Polycarpic | FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
82%
From NCERT
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The given figure shows:
1. Multicarpellary, syncarpous pistil
2. Multicarpellary, apocarpous gynoecium
3. Monocarpellary gynoecium
4. Sterile pistil
1. Multicarpellary, syncarpous pistil2. Multicarpellary, apocarpous gynoecium
3. Monocarpellary gynoecium
4. Sterile pistil
Subtopic: Monocarpic & Polycarpic | Pistil: Ovule | Pistil: Female Gametophyte |
78%
From NCERT
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Consider the given two statements:
| Assertion (A): | Endosperm tissue of angiosperms can be a source of nutrition in animal diet. |
| Reason (R): | Wheat endosperm is ground into flour for bread, while barley endosperm is the main source of sugars for beer production. |
| 1. | Both (A) and (R) are True and (R) explains (A) |
| 2. | Both (A) and (R) are True and (R) does not explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Endosperm |
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Consider the given two statements:
| Assertion (A): | Seed is the basis of our agriculture. |
| Reason (R): | Seeds are normally the products of sexual reproduction in angiosperms. |
| 1. | Both (A) and (R) are True and (R) explains (A) |
| 2. | Both (A) and (R) are True and (R) does not explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Seed |
68%
From NCERT
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Nucellar embryony:
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 a type of apomixes |
| II: | occurs in many citrus varieties |
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: Apomixis & Polyembryony |
79%
From NCERT
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| 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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