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Q. No.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 |
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Level 2: 60%+
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Identify the layer in the wall of the anther as shown in the given figure labeled as B?
1. Epidermis
2. Endothecium
3. Middle layer
4. Tapetum
1. Epidermis2. Endothecium
3. Middle layer
4. Tapetum
Subtopic: Stamen: Anther |
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Level 1: 80%+
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What will be the ploidy of the endosperm in an angiosperm produced as a result of a cross between a tetraploid female plant and a diploid male plant?
1. Triploid
2. Tetraploid
3. Pentaploid
4. Hexaploid
1. Triploid
2. Tetraploid
3. Pentaploid
4. Hexaploid
Subtopic: Post Pollination Events | Double Fertilization | Endosperm |
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An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is:
| 1. | Cuticle | 2. | Sporopollenin |
| 3. | Lignin | 4. | Cellulose |
Subtopic: Stamen: Male Gametophyte |
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Level 1: 80%+
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Which statement is true about monosporic embryo sac development in flowering plants?
| 1. | It originates from one megaspore and involves three mitotic divisions. |
| 2. | It involves the development of eight megaspores from one mother cell. |
| 3. | It results in the formation of a seven-nucleate, eight-celled structure. |
| 4. | It begins with multiple sporogenous cells. |
Subtopic: Pistil: Female Gametophyte |
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Consider the given two statements:
| Assertion (A): | The endosperm is formed before fertilization in most flowering plants. |
| Reason (R): | The endosperm serves as a nutritional source for the developing embryo. |
| 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. | (A) is False, (R) is True. |
Subtopic: Endosperm |
Level 3: 35%-60%
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Consider the given two statements:
| Statement I: | Cryopreservation or cryoconservation is a process where biological material - cells, tissues, or organs - are frozen to preserve the material for an extended period of time. |
| Statement II: | It is not possible to store pollen grains of angiosperms by cryopreservation. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Monocarpic & Polycarpic | Stamen: Anther | Stamen: Microsporangium | Stamen: Male Gametophyte |
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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 |
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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 |
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Regarding gynoecium in angiosperms:
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: | The basal bulged part of the pistil is the ovary. |
| II: | Inside the ovary is the ovarian cavity (locule). |
| III: | The placenta is located inside the ovarian cavity. |
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: Pistil: Female Gametophyte |
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