Q. No.Which of the following structures is homologous to the wing of a bird?
1. Dorsal fin of a shark
2. Wing of a moth
3. Hind limb of Rabbit
4. Flipper of whale
1. Dorsal fin of a shark
2. Wing of a moth
3. Hind limb of Rabbit
4. Flipper of whale
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Analogous structures are result of
1. Divergent evolution
2. Convergent evolution
3. Shared evolution
4. Stabilizing selection
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Which of the following is correct sequence of events in the origin of life?
I. formation of protobionts
II. synthesis of organic monomers
III. synthesis of organic polymers
IV. formation of DNA based genetic systems
1. I, III, II, IV
2. II, III, I, IV
3. II, III, IV, I
4. I, II, III, IV
Genetic drift operates in
1. Large isolated populations
2. Non-reproductive populations
3. Slow reproductive populations
4. Small isolated population
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In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by
1. 2pq
2. Pq
3. q2
4. p2
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The chronological order of human evolution from early to the recent is:
| 1. | Ramapithecus → Australopithecus → Homo habilis → Homo erectus |
| 2. | Ramapithecus → Homo habilis → australopithecus → Homo erectus |
| 3. | Australopithecus → Homo habilis → Ramapithecus → Homo erectus |
| 4. | Australopithecus → Ramapithecus → Homo habilis → Homo erectus |
According to Hugo de Vries, the mechanism of evolution is:
| 1. | Phenotypic variations | 2. | Saltation |
| 3. | Multiple-step mutation | 4. | Minor mutations |
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Among the following sets of examples for divergent evolution, select the incorrect option:
1. Brain of bat, man and cheetah
2. Heart of bat, man and cheetah
3. Forelimbs of man, bat and cheetah
4. Eye of octopus, bat and man
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The similarity of bone structure in the forelimbs of many vertebrates is an example of:
1. Convergent evolution
2. Analogy
3. Homology
4. Adaptive radiation
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Sickle cell anaemia has not been eliminated from African population as
1. It is controlled by dominant genes
2. It is controlled by recessive genes
3. It is not a fatal disease
4. It provides immunity against malaria
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