Select Chapter Topics:
Q. No.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
Please attempt this question first.
Hints
Please attempt this question first.
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 |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Pollination by bees is called
1. melittophily
2. phalaenophily
3. ornithophily
4. chiropterophily
1. melittophily
2. phalaenophily
3. ornithophily
4. chiropterophily
Subtopic: Pollination & Outbreeding Devices |
50%
Please attempt this question first.
Hints
The generative cell of the pollen grain:
1. is larger than the vegetative cell
2. divides by meiosis to produce male gametes
3. is never “free” of the vegetative cell
4. is a syncytium
1. is larger than the vegetative cell
2. divides by meiosis to produce male gametes
3. is never “free” of the vegetative cell
4. is a syncytium
Subtopic: Stamen: Male Gametophyte |
Please attempt this question first.
Hints
Consider the two statements:
| Assertion (A): | Flowering plants have evolved adaptations to promote cross pollination. |
| Reason (R): | Most angiosperms are dioeceous plants. |
| 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: Pollination & Outbreeding Devices |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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 |
56%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Assertion(A): | Majority of flowering plants produce unisexual flowers. |
| Reason (R): | In unisexual flowers, pollen grains are likely to come in contact with the stigma of the same flower. |
| 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: Pollination & Outbreeding Devices |
51%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
Regarding outbreeding devices in angiosperms:
| A: | Self-incompatibility allows only self-pollen to fertilise ovules. |
| B: | Dioecy prevents autogamy but not geitonogamy. |
| 1. | Only A is correct |
| 2. | Only B is correct |
| 3. | Both A and B are correct |
| 4. | Both A and B are incorrect |
Subtopic: Pollination & Outbreeding Devices |
51%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2025 GoodEd Technologies Pvt. Ltd.