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Q. No.In a typically complete, bisexual, and hypogynous flower, the arrangement of floral whorls on the thalamus from the outermost to the innermost is:
| 1. | Calyx, corolla, androecium, and gynoecium |
| 2. | Calyx, corolla, gynoecium, and androecium |
| 3. | Gynoecium, androecium, corolla, and calyx |
| 4. | Androecium, gynoecium, corolla, and calyx |
Subtopic: Pollen - Pistil Interaction |
80%
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In angiosperms, which cell divides mitotically to produce male gametes?
| 1. | Pollen mother cell | 2. | Generative cell |
| 3. | Vegetative cell | 4. | Central cell |
Subtopic: Pollen - Pistil Interaction |
82%
From NCERT
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The gynoecium with many pistils that are fused together will best be described as:
1. monocarpellary, apocarpous
2. multicarpellary, syncarpous
3. multicarpellary, synandrous
4. monocarpellary, apocarpous
1. monocarpellary, apocarpous
2. multicarpellary, syncarpous
3. multicarpellary, synandrous
4. monocarpellary, apocarpous
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte | Pollen - Pistil Interaction |
93%
From NCERT
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What guides the entry of the pollen tube though the micropyle into the embryo sac in the angiosperms?
1. Antipodals
2. Filiform apparatus in synergids
3. The egg cell
4. Polar nuclei
1. Antipodals
2. Filiform apparatus in synergids
3. The egg cell
4. Polar nuclei
Subtopic: Pollen - Pistil Interaction |
96%
From NCERT
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Regarding pollen-pistil Interaction:
| 1. | Pollination guarantees fertilisation |
| 2. | Pollination guarantees the transfer of the right type of compatible pollen of the same species as the stigma |
| 3. | The pistil has the ability to recognise the pollen, whether it is of the right type (compatible) or of the wrong type (incompatible). |
| 4. | The ability of the pistil to recognise the pollen followed by its acceptance or rejection is the result of a continuous dialogue between pollen grain and the pistil mediated by neural signals. |
Subtopic: Pollen - Pistil Interaction |
81%
From NCERT
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Emasculation is done in artificial plant hybridisation experiments to:
| 1. | prevent undesired pollen from landing on the stigma |
| 2. | enhance the fertility of the plant |
| 3. | render the plant sterile |
| 4. | prevent self-pollination in plants |
Subtopic: Pollen - Pistil Interaction |
71%
From NCERT
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In artificial hybridization experiments, if the female plant produces unisexual flowers, emasculation:
| 1. | Must be done before maturity. |
| 2. | Must be done after maturity. |
| 3. | Must be done at maturity. |
| 4. | Is not needed. |
Subtopic: Pollen - Pistil Interaction |
80%
From NCERT
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Consider the given two statements:
| Assertion (A): | Most zygotes divide only after certain amount of endosperm is formed. |
| Reason (R): | Embryo develops at the micropylar end of the embryo sac where the zygote is situated. |
| 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: Pollen - Pistil Interaction |
82%
From NCERT
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