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Q. No.Which of the following represents the female gametophyte?
1. Ovule
2. Embryo sac
3. Nucellus
4. Endosperm
Subtopic: Pistil: Ovule |
79%
From NCERT
NEET - 2024
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The flowers of Amorphophallus provide safe place for the pollinator to lay eggs. This is an example of:
| 1. | Amensalism | 2. | Anemophily |
| 3. | Floral reward | 4. | Commensalism |
Subtopic: Pollination & Outbreeding Devices |
67%
From NCERT
NEET - 2024
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The junction between ovule and funicle is represented by :
| 1. | Nucellus | 2. | Integument |
| 3. | Chalaza | 4. | Hilum |
Subtopic: Pistil: Ovule |
91%
From NCERT
NEET - 2024
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Identify the correct description about the given figure:
| 1. | Water pollinated flowers showing stamens with mucilaginous covering. |
| 2. | Cleistogamous flowers showing autogamy. |
| 3. | Compact inflorescence showing complete autogamy. |
| 4. | Wind pollinated plant inflorescence showing flowers with well exposed stamens. |
Subtopic: Pollination & Outbreeding Devices |
80%
From NCERT
NEET - 2024
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Identify the set of correct statements:
Choose the correct answer from the options given below:
1. A, B, C and D only
2. A, C, D and E only
3. B, C, D and E only
4. C, D and E only
| A: | The flowers of Vallisneria are colourful and produce nectar. |
| B: | The flowers of waterlily are not pollinated by water. |
| C: | In most of water-pollinated species, the pollen grains are protected from wetting. |
| D: | Pollen grains of some hydrophytes are long and ribbon like. |
| E: | In some hydrophytes, the pollen grains are carried passively inside water. |
Choose the correct answer from the options given below:
1. A, B, C and D only
2. A, C, D and E only
3. B, C, D and E only
4. C, D and E only
Subtopic: Pollination & Outbreeding Devices |
73%
From NCERT
NEET - 2024
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| Assertion (A): | Apomictic embryos are generally identical to the parent plant. |
| Reason (R): | Apomixis is the production of seeds without fertilisation. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Apomixis & Polyembryony |
65%
From NCERT
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A student researching an artificial crop improvement project in wheat growing in a certain field saw that wheat plants were covered with bags made up of butter paper.
What is the purpose of covering these plants with butter paper bags?
1. to reduce transpiration.
2. to reduce photosynthesis.
3. to hide the identity of the plants.
4. to prevent unwanted pollination.
What is the purpose of covering these plants with butter paper bags?
1. to reduce transpiration.
2. to reduce photosynthesis.
3. to hide the identity of the plants.
4. to prevent unwanted pollination.
Subtopic: Pollen - Pistil Interaction |
89%
From NCERT
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If a wrong type of pollen or pollen from a different species lands on the stigma, which of these is not formed?
1. egg cell
2. embryo
3. embryo sac
4. all of the above will be formed
1. egg cell
2. embryo
3. embryo sac
4. all of the above will be formed
Subtopic: Pollen - Pistil Interaction |
52%
From NCERT
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What is common between the two species shown in the figures?
1. Both are angiosperms.
2. Both are gymnosperm.
3. Both are chasmogamous flowers.
4. Both (1) and (3)
1. Both are angiosperms.
2. Both are gymnosperm.
3. Both are chasmogamous flowers.
4. Both (1) and (3)
Subtopic: Pollination & Outbreeding Devices |
64%
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Which of the following outbreeding devices are used by majority of flowering plants to prevent inbreeding depression?
(i) Pollen release and stigma receptivity are not synchronised.
(ii) Different positions of anther and stigma.
(iii) Production of different types of pollen grains.
(iv) Formation of unisexual flowers along with bisexual flowers.
(v) Preventing self-pollen from fertilising the ovules by inhibiting pollen germination.
1. (i), (ii) and (v)
2. (ii), (iii) and (v)
3. (i), (iii) and (v)
4. (iii), (iv) and (v)
(i) Pollen release and stigma receptivity are not synchronised.
(ii) Different positions of anther and stigma.
(iii) Production of different types of pollen grains.
(iv) Formation of unisexual flowers along with bisexual flowers.
(v) Preventing self-pollen from fertilising the ovules by inhibiting pollen germination.
1. (i), (ii) and (v)
2. (ii), (iii) and (v)
3. (i), (iii) and (v)
4. (iii), (iv) and (v)
Subtopic: Pollination & Outbreeding Devices |
76%
From NCERT
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