Q. No.Which of the following is an example for link species?
1. Lobe fish
2. Dodo bird
3. Sea weed
4. Chimpanzee
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Match the scientists listed under Column ‘I’ with ideas listed in Column ‘II’.
| Column I | Column II | ||
| 1. | Darwin | i. | abiogenesis |
| 2. | Oparin | ii. | use and disuse of organs |
| 3. | Lamarck | iii. | continental drift theory |
| 4. | Wagner | iv. | evolution by natural selection |
| 1. | A-i; B-iv; C-ii; D-iii | 2. | A-iv; B-i; C-ii; D-iii |
| 3. | A-ii; B-iv; C-iii; D-i | 4. | A-iv; B-iii; C-ii; D-i |
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In 1953, S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for the origin of the first form of life from pre-existing non-living organic molecules. The primitive earth conditions created include:
| 1. | low temperature, volcanic storms, an atmosphere rich in oxygen |
| 2. | low temperature, volcanic storms, reducing atmosphere |
| 3. | high temperature, volcanic storms, non-reducing atmosphere |
| 4. | high temperature, volcanic storms, reducing atmosphere containing CH4, NH3 etc. |
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Variations during mutations of meiotic recombinations are:
1. random and directionless
2. random and directional
3. small and directional
4. random, small and directional
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Darwin's in his natural selection Theory did not believe in any role of which one of the following in organic evolution?
1. Parasites and predators as natural enemies
2. Survival of the fittest
3. Struggle for existence
4. Discontinuous variations
Convergent evolution is illustrated by
1. rat and dog.
2. bacterium and protozoan
3. starfish and cuttlefish
4. dogfish and whale
Industrial melanism is an example of
1. drug resistance
2. darkening of skin due to smoke from industries
3. protective resemblance with the surroundings
4. defensive adaptation of skin against ultraviolet radiations.
Which one of the following correctly describes the homologous structures?
1. Organs with anatomical similarities, but performing different functions.
2, Organs with anatomical dissimilarities, but performing same functions.
3. Organs that have no functions now, but had an important function in ancestors.
4. Organs appearing only in embryonic stage and disappearing later in the adult.
Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?
| 1. | Overproduction, variations, constancy of population size, natural selection |
| 2. | Variations, constancy of population size, overproduction, natural selection |
| 3. | Overproduction, constancy of population size, variations, natural selections |
| 4. | Variations, natural selection, overproduction, constancy of population size |
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If a random mating population is in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner?
1. Mutations
2. Random drift
3. Selection
4. Migration
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