Q. No.The theory of spontaneous generation stated that:
1.
life arose from living forms only
2.
life can arise from both living and non-living
3.
life can arise from non-living things only
4.
life arises spontaneously, neither from the living nor from the non-living
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Palaeontological evidence for evolution refers to the:
| 1. | development of the embryo | 2. | homologous organs |
| 3. | fossils | 4. | analogous organs |
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Analogous organs arise due to:
| 1. | divergent evolution | 2. | artificial selection |
| 3. | genetic drift | 4. | convergent evolution |
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1. Sedimentary rocks
2. Igneous rocks
3. Metamorphic rocks
4. Any type of rock
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For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN-blood group-bearing organisms is likely to be:
| 1. | 42% | 2. | 49% |
| 3. | 9% | 4. | 58% |
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Which type of selection explains industrial melanism observed in moth, Biston betularia?
| 1. | Stabilising | 2. | Directional |
| 3. | Disruptive | 4. | Artificial |
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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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Which of the following types of natural selection reduces variation but does not change the mean value?
| 1. | directional | 2. | stabilizing |
| 3. | disruptive | 4. | all of these |
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Which of the following pairs of organs do not represent analogous organs?
| 1. | Eye of an octopus and the eye of a mammal |
| 2. | Flippers of penguins and flippers of dolphin |
| 3. | Wings of bats and forelimbs of humans |
| 4. | Wings of birds and wings of butterfly |
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Plica semilunaris on the inside corner of the eye and, muscles in the pinna are:
| 1. | analogous structures | 2. | homologous structures |
| 3. | vestigial structures | 4. | phylogenetic structures |
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