Q. No.There is no natural death in single-celled organisms like Amoeba and bacteria because:
1. They cannot reproduce sexually
2. They reproduce by binary fission
3. Parental body is distributed among the offspring
4. They are microscopic
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There are various types of reproduction. The type of reproduction adopted by an organism depends on:
| 1. | The habitat and morphology of the organism |
| 2. | Morphology of the organism |
| 3. | Morphology and physiology of the organism |
| 4. | The organism’s habitat, physiology, and genetic makeup |
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Identify the incorrect statement :
| 1. | In asexual reproduction, the offspring produced are morphologically and genetically identical to the parent |
| 2. | Zoospores are sexual reproductive structures |
| 3. | In asexual reproduction, a single parent produces offspring with or without the formation of gametes |
| 4. | Conidia are asexual structures in Penicillium |
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Which of the following is a post-fertilisation event in flowering plants?
1. Transfer of pollen grains
2. Embryo development
3. Formation of flower
4. Formation of pollen grains
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The number of chromosomes in the shoot-tip cells of a maize plant is 20. The number of chromosomes in the microspore mother cells of the same plant shall be:
1. 20
2. 10
3. 40
4. 15
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The product of sexual reproduction generally generates:
1. Large biomass
2. Longer viability of seeds
3. Prolonged dormancy
4. New genetic combinations leading to variations
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The process of sexual reproduction which involves meiosis and syngamy is:
| 1. | Apomixis | 2. | Amphimixis |
| 3. | Agamospermy | 4. | Diplospory |
Planaria possesses high capacity of
1. Regeneration
2. Alternation of generations
3. Bioluminescence
4. Metamorphosis
In which one pair from the pairs given below, both the plants can be vegetatively propagated by leaf segments?
1. Agave and Kalanchoe
2. Bryophyllum and Kalanchoe
3. Asparagus and Bryophyllum
4.Chrysanthemum and Agave
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