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Q. No.At the four nucleate stage, the number of cells present in a female gametophyte of a typical angiosperm is:
| 1. | 1 | 2. | 2 |
| 3. | 4 | 4. | 7 |
Subtopic: Pistil: Female Gametophyte |
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The first mitotic division of the zygote in angiosperms divides the fertilized egg into a basal cell and a terminal cell where:
| 1. | the basal cell degenerates and the terminal cell gives rise to both the embryo and the suspensor |
| 2. | the terminal cell degenerates and the basal cell gives rise to both the embryo and the suspensor |
| 3. | the terminal cell gives rise to most of the embryo and the basal cell produces the suspensor |
| 4. | the basal cell gives rise to most of the embryo and the terminal cell produces the suspensor |
Subtopic: Double Fertilization |
From NCERT
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The plumule of a eudicot seed consists of all of the following except
| 1. | Epicotyl | 2. | Shoot apical meristem |
| 3. | Young leaves | 4. | Hypocotyl |
Subtopic: Seed |
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From NCERT
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In Michelia, the gynoecium:
1. has multiple distinct carpels
2. has multiple carpels fused in a single bundle
3. has a single carpel
4. has multiple carpels fused in multiple bundles
1. has multiple distinct carpels
2. has multiple carpels fused in a single bundle
3. has a single carpel
4. has multiple carpels fused in multiple bundles
Subtopic: Pistil: Female Gametophyte |
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From NCERT
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Which of the following is the correct description of an anther?
| 1. | Pollen sac |
| 2. | The pollen-producing reproductive organ of a flower |
| 3. | The male gametophyte of angiosperms |
| 4. | The part of a stamen that contains the pollen |
Subtopic: Stamen: Anther |
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From NCERT
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Consider the given two statements:
| Statement I: | In over 60 per cent of angiosperms, pollen grains are shed at 2-celled stage. |
| Statement II: | In the remaining species, the vegetative cell divides mitotically to give rise to the two male gametes before pollen grains are shed (3-celled stage). |
| 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 |
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From NCERT
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Consider the given two statements:
| Assertion (A): | In angiosperms, seed formation is a dependable process of sexual reproduction. |
| Reason (R): | In angiosperms, reproductive processes such as pollination and fertilisation are independent of water. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Monocarpic & Polycarpic | Seed | FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
From NCERT
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Consider the given two statements:
| Assertion (A): | Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent. |
| Reason (R): | Germ pore is the structure through which the germ tube or pollen tube makes its exit on germination. |
| 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: Stamen: Male Gametophyte |
From NCERT
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Three options given below describe the same structure in an angiosperm. Identify the one that does not belong to the group?
1. Megagametophyte
2. Megasporangium
3. Female gametophyte
4. Embryo sac
1. Megagametophyte
2. Megasporangium
3. Female gametophyte
4. Embryo sac
Subtopic: FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
From NCERT
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Consider the given two statements:
| Statement I: | The pollen can recognize the pistil, whether it is of the right type (compatible) or of the wrong type (incompatible). |
| Statement II: | Pollen of the same species will not be compatible and will not be allowed to germinate on the stigma. |
| 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: Pollination & Outbreeding Devices |
From NCERT
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