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Q. No.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 |
58%
Level 3: 35%-60%
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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 |
57%
Level 3: 35%-60%
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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 |
56%
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
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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 |
56%
Level 3: 35%-60%
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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 |
Level 4: Below 35%
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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 |
Level 3: 35%-60%
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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 |
Subtopic: FLOWER – A FASCINATING ORGAN OF ANGIOSPERMS |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
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