The only type of pollination which brings genetically different types of pollen grains to the stigma is:
1. Cleistogamy
2. Chasmogamy
3. Geitonogamy
4. Xenogamy

Subtopic:  Pollination & Outbreeding Devices |
 91%
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In ‘double fertilization’ in angiosperms:
I: Syngamy results in the formation of zygote.
II: Triple fusion results in the formation of the primary endosperm nucleus.
 
1. Only I is correct.
2. Only II is correct.
3. Both I and II are correct.
4. Both I and II are incorrect.
Subtopic:  Double Fertilization |
 93%
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The female gametophyte in the angiosperms is:
 
1. 7 celled and 8 nucleate   
2. 8 celled and 7 nucleate
3. 7 celled and 7 nucleate
4. 8 celled and 8 nucleate
Subtopic:  Pistil: Female Gametophyte |
 92%
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Identify the incorrect statement:
1. Typical angiosperm anther is bilobed and dithecous.
2. Tapetum in the wall of the anther nourishes the developing pollen grains.
3. In over 60 % of angiosperms, pollen grains are shed at the three-celled stage.
4. Pollen exine is made up of sporopollenin.
Subtopic:  Stamen: Male Gametophyte |
 92%
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The shield-like cotyledon in grass [monocot] seeds is called:
1. Plumule
2. Scutellum
3. Perisperm
4. Coleoptile
Subtopic:  Seed |
 91%
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Nucellar polyembryony is seen in:
1. Citrus and Mango
2. Castor and Pea
3. Grasses and Mustard
4. Orchids and China rose

Subtopic:  Apomixis & Polyembryony |
 82%
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In an angiosperm, the ovule is attached to the placenta by a stalk called:
1. Funicle
2. Raphe
3. Hilum
4. Chalaza
Subtopic:  Pistil: Ovule |
 89%
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Wind-pollinated flowers are characterized by:

1. being heavily scented   
2. highly attractive colours
3. non-sticky light pollen grains, well-exposed stamen, large feathery stigma
4. ribbon shaped pollen with mucilaginous covering
Subtopic:  Pollination & Outbreeding Devices |
 94%
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Endosperm may persist in mature seed in:
1. Pea and Apple
2. Groundnut and Wheat
3. Beans and Mango
4. Castor and Coconut
Subtopic:  Endosperm |
 86%
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Identify the incorrect statement related to Pollination: 
 
1. Moths and butterflies are the most dominant pollinating agents among insects 
2. Pollination by water is quite rare in flowering plants 
3. Pollination by wind is more common amongst abiotic pollination 
4. Flowers produce foul odours to attract flies and beetles to get pollinated 
Subtopic:  Pollination & Outbreeding Devices |
 79%
From NCERT
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