Subtopic: Â Stamen: Male Gametophyte |
 97%
From NCERT
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Subtopic: Â Pollination & Outbreeding Devices |
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Match the following Columns:
1. 3 2 1 4
2. 2 4 1 3
3. 4 3 2 1
4. 1 3 2 4
| Column I (Pollination technique) |
Column II (Pollinator) |
| A. Cheiropterophily | 1. Ant |
| B. Anemophily | 2. Bat |
| C. Myrmecophily | 3. Snail |
| D. Malacophily | 4. Wind |
2. 2 4 1 3
3. 4 3 2 1
4. 1 3 2 4
Subtopic: Â Pollination & Outbreeding Devices |
 87%
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Subtopic: Â Stamen: Male Gametophyte |
 97%
From NCERT
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In some organisms, karyokinesis is not followed by cytokinesis as a result of which multinucleate condition arises leading to the formation of syncytium. The perfect example for this is
1. appearance of a furrow in cell membrane.
2. liquid endosperm in coconut.
3. sexual reproduction.
4. fertilisation.
1. appearance of a furrow in cell membrane.
2. liquid endosperm in coconut.
3. sexual reproduction.
4. fertilisation.
Subtopic: Â Endosperm |
 87%
From NCERT
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Subtopic: Â Pollination & Outbreeding Devices |
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Subtopic: Â Apomixis & Polyembryony |
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In Cycas, pollination takes place in
1. 3-celled stage
2. 4-celled stage
3. 2-celled stage
4. 1-celled stage
1. 3-celled stage
2. 4-celled stage
3. 2-celled stage
4. 1-celled stage
Subtopic: Â Stamen: Male Gametophyte |Â Pollination & Outbreeding Devices |
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Nucellus forms which of the following part of fruit?
1. Seed coat
2. Perisperm
3. Seed
4. Raphe
1. Seed coat
2. Perisperm
3. Seed
4. Raphe
Subtopic: Â Seed |
 83%
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Growth of pollen tube towards embryo sac is
1. geotropism
2. thigmotaxis
3. chemotaxis
4. All of these
1. geotropism
2. thigmotaxis
3. chemotaxis
4. All of these
Subtopic: Â Pollen - Pistil Interaction |
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