Q. No.The endosperm is usually completely consumed by the developing embryo in all the following except:
1.
Pea
2.
Castor
3.
Bean
4.
Groundnut
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In an angiosperm, the structure that develops and becomes a pollen sac is called:
| 1. | Megasporophyll | 2. | Megasporangium |
| 3. | Microsporangium | 4. | Microsporophyll |
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Central cell in a female embryo sac, after triple fusion, becomes the:
| 1. | Zygote | 2. | Primary endosperm nucleus |
| 3. | Endosperm | 4. | Primary endosperm cell |
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‘Germ pore’ in pollen in angiosperms:
| 1. | is a part of pollen intine where sporopollenin is present |
| 2. | is a part of pollen intine where sporopollenin is absent |
| 3. | is a part of pollen exine where sporopollenin is present |
| 4. | is a part of pollen exine where sporopollenin is absent |
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Seed formation is a more dependable reproductive strategy in angiosperms because:
| 1. | Pollination and fertilization are independent of water |
| 2. | Seeds have better adaptive strategies for dispersal |
| 3. | Seeds have sufficient food reserves |
| 4. | New genetic combinations are generated during seed formation |
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Cellular thickenings called filiform apparatus are seen in:
| 1. | Antipodals | 2. | Synergids |
| 3. | Egg cell | 4. | Central cell |
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Wind-pollinated flowers are characterized by the following, except:
| 1. | Light and non-sticky pollen grains |
| 2. | Well-exposed stamens |
| 3. | Many ovules in each ovary |
| 4. | Large, often-feathery stigma |
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The Yucca plant is pollinated by:
1. an obligatory mutualist moth
2. an obligatory mutualist honeybee
3. a commensal moth
4. a commensal honeybee
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What is the advantage of converting hybrids into apomicts for farmers?
| 1. | Can be easily produced year after year |
| 2. | Segregation of traits creates more diversity |
| 3. | A great reduction in cost |
| 4. | Overcoming inbreeding depression |
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