Q. No.‘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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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 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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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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Apomixis is:
| I: | production of seeds without fertilization |
| II: | production of fruits without fertilization |
| III: | a form of asexual reproduction that mimics sexual reproduction |
1. Only I and II are correct
2. Only I is correct
3. Only III is correct
4. Only I and III are correct
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Seeds offer several advantages to angiosperms. Which of the following is not one?
| 1. | The process is more dependable |
| 2. | Better adaptive strategies for dispersal |
| 3. | Protection of the young embryo |
| 4. | Genetic uniformity |
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Scutellum is:
| 1. | the cotyledon in seeds of the grass family |
| 2. | globular embryo of a dicot |
| 3. | persistent nucellus in a seed |
| 4. | undifferentiated sheath enclosing root cap in monocot seeds |
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