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Q. No.Consider the given two statements:
I:
Pollination by wind is more common amongst abiotic pollinations.
II:
Wind pollination requires that the pollen grains are light and non-sticky.
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: Pollination & Outbreeding Devices |
92%
From NCERT
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Pollination by water:
| 1. | is very common in flowering plants but is limited mostly to monocotyledons. |
| 2. | is quite rare in flowering plants and is limited mostly to dicotyledons. |
| 3. | is quite rare in flowering plants and is limited mostly to monocotyledons. |
| 4. | is very common in flowering plants but is limited mostly to dicotyledons. |
Subtopic: Pollination & Outbreeding Devices |
71%
From NCERT
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Consider the given two statements:
| Assertion (A): | Majority of insect-pollinated flowers are large, colourful, fragrant and rich in nectar. |
| Reason (R): | Animals are attracted to flowers by colour and/or fragrance. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True and (R) correctly explains (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Pollination & Outbreeding Devices |
80%
From NCERT
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What floral reward does Amorphophallus provide to its pollinator?
1. Nectar
2. Safe places to lay eggs
3. Protection from predation due to its tall height
4. Camouflage
1. Nectar
2. Safe places to lay eggs
3. Protection from predation due to its tall height
4. Camouflage
Subtopic: Pollination & Outbreeding Devices |
83%
From NCERT
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If both male and female flowers are present on the same plant such as castor and maize:
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: | the plants are called as monoecious |
| II: | it prevents autogamy but not geitonogamy |
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: Pollination & Outbreeding Devices |
80%
From NCERT
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In plants which shed pollen in the three-celled condition, pollen tubes carry:
| 1. | a single male gametes from the beginning |
| 2. | two male gametes from the beginning |
| 3. | two male gametes after the division in generative cell |
| 4. | two male gametes after the division in vegetative cell |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
From NCERT
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Pollen tube enters the ovule:
| 1. | through the micropyle and then enters one of the synergids through the filiform apparatus. |
| 2. | through the chalaza and then enters one of the synergids through the filiform apparatus. |
| 3. | through the micropyle and then enters one of the antipodals through the egg apparatus. |
| 4. | through the chalaza and then enters one of the antipodals through the egg apparatus. |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
94%
From NCERT
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During artificial hybridisation experiments:
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: | If the female parent produces unisexual flowers, there is no need for emasculation. |
| II: | The female flower buds are never bagged as well. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Post Pollination Events |
82%
From NCERT
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The central cell of the embryo sac:
| 1. | after syngamy becomes the primary endosperm cells |
| 2. | after syngamy becomes the zygote |
| 3. | after triple fusion becomes the primary endosperm cell |
| 4. | after triple fusion becomes the zygote |
Subtopic: Double Fertilization |
91%
From NCERT
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Endosperm is completely consumed by the developing embryo in all of the following angiosperms, except:
| 1. | pea | 2. | groundnut |
| 3. | beans | 4. | coconut |
Subtopic: Seed |
91%
From NCERT
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