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Q. No.In angiosperms, the mature female gametophyte is represented by:
1.
Nucellus
2.
Megaspore
3.
MMC
4.
Embryosac
Subtopic: Pistil: Female Gametophyte |
81%
From NCERT
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A typical angiosperm embryosac, at maturity, is:
| 1. | 8 celled and 8 nucleate | 2. | 8 celled and 7 nucleate |
| 3. | 7 celled and 8 nucleate | 4. | 7 celled and 7 nucleate |
Subtopic: Pistil: Ovule |
92%
From NCERT
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Chasmocleistogamy [Amphicarpy] is not seen in:
| 1. | Viola [Common pansy] | 2. | Oxalis |
| 3. | Pisum sativum | 4. | Commelina |
Subtopic: Pollination & Outbreeding Devices |
91%
From NCERT
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The dominating pollinating agent of flowering plants amongst animals are:
| 1. | Arboreal mammals | 2. | Insects |
| 3. | Birds | 4. | Reptiles |
Subtopic: Pollination & Outbreeding Devices |
92%
From NCERT
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A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
Subtopic: Stamen: Anther | Stamen: Microsporangium |
95%
From NCERT
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What is true about the vegetative cell in the pollen tube?
| 1. | It is smaller than the generative cell |
| 2. | It has an irregular shaped nucleus |
| 3. | It floats in the cytoplasm of the generative cell |
| 4. | It has a dense cytoplasm lacking food reserves |
Subtopic: Stamen: Anther | Stamen: Microsporangium |
82%
From NCERT
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In a multicarpellary syncarpous ovary:
| 1. | There is more than one pistil that is fused with the other |
| 2. | There is more than one pistil that is free from each other |
| 3. | There is one pistil that is fused with the stamen |
| 4. | There is more than one pistil that is fused with the stamen |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
88%
From NCERT
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When the embryosac develops from a single functional megaspore [the other three get generate], it is called as:
| 1. | Monosporic | 2. | Bisporic |
| 3. | Trisporic | 4. | Tetrasporic |
Subtopic: Pistil: Ovule |
92%
From NCERT
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Geitonogamy is:
| 1. | Functionally cross–pollination but genetically autogamy |
| 2. | Functionally autogamy but genetically cross-pollination |
| 3. | Functionally and genetically autogamy |
| 4. | Functionally and genetically cross-pollination |
Subtopic: Pollination & Outbreeding Devices |
89%
From NCERT
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Which of the following is/are a marine plant pollinated by water?
| 1. | Vallisneria | 2. | Hydrilla |
| 3. | Zostera | 4. | Both 1 and 2 |
Subtopic: Pollination & Outbreeding Devices |
62%
From NCERT
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