Q. No.
The bones of forelimbs of whales, bats, cheetahs, and men are similar in structure, because:
| 1. | one organism has given rise to another |
| 2. | they share a common ancestor |
| 3. | they perform the same function |
| 4. | they have biochemical similarities |
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The appearance of antibiotic-resistant bacteria is an example of:
1. adaptive radiation
2. transduction
3. pre-existing variation in the population
4. divergent evolution
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The most accepted line of descent in human evolution is:
| 1. | Australopithecus → Ramapithecus → Homo sapiens → Homo habilis |
| 2. | Homo erectus → Homo habilis → Homo sapiens |
| 3. | Ramapithecus → Homo habilis → Homo erectus → Homo sapiens |
| 4. | Australopithecus → Ramapithecus → Homo erectus → Homo habilis → Homo sapiens. |
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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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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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According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
| 1. | Oxygen | 2. | Hydrogen |
| 3. | Water vapour | 4. | Methane |
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The age of fossils in the past was generally determined by the radiocarbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms include:
| 1. | study of the conditions of fossilization. |
| 2. | electron spin resonance (ESR) and fossil DNA. |
| 3. | study of carbohydrates/proteins in rocks. |
| 4. | study of carbohydrates/proteins in fossils. |
There are two opposing views about the origin of modern man. According to one view, Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA, however, suggested the African origin of modern man. What kind of observation of DNA variation could suggest?
| 1. | Greater variation in Asia than in Africa. |
| 2. | Similar variation in Africa and Asia. |
| 3. | Variation only in Asia and no variation in Africa. |
| 4. | Greater variation in Africa than in Asia. |
Which one of the following experiments suggests that the simplest living organisms could not have originated spontaneously from non-living matter?
| 1. | Larvae could appear in decaying organic matter. |
| 2. | Meat was not spoiled, when heated and kept sealed in a vessel. |
| 3. | Microbes did not appear in stored meat. |
| 4. | Microbes appeared from unsterilized organic matter. |
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