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 |
 84%
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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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Male gamete in angiosperm is produced hy
1. generative cell
2. microspore cell
3. vegetative cell
4. tube cell
1. generative cell
2. microspore cell
3. vegetative cell
4. tube cell
Subtopic: Â Stamen: Male Gametophyte |
 81%
From NCERT
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Number of chromosomes in an angiosperm plant is 14, then the number of chromosomes in synergid cells will be
| 1. | 14 | 2. | 7 |
| 3. | 28 | 4. | 21 |
Subtopic: Â Pistil: Ovule |
 68%
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 |
 88%
From NCERT
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Subtopic: Â Stamen: Male Gametophyte |
 97%
From NCERT
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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 |
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