Q. No.The most likely reason for the development of resistance against pesticides in insects damaging a crop is
1. Genetic recombination
2. directed mutations
3. Acquired heritable changes.
4. Random mutations
1. Genetic recombination
2. directed mutations
3. Acquired heritable changes.
4. Random mutations
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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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Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution?
| 1. | Production of Dolly, the sheep by cloning. |
| 2. | Development of organs from stem cells for organ transplantation. |
| 3. | Development of transgenic animals. |
| 4. | Prevalence of pesticide resistant insects. |
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Which of the following is relatively most accurate method for dating of fossils?
1. Electron-spin resonance method
2. Uranium-lead method
3. Potassium-argon method
4. Radio-carbon method
De Vries gave his mutation theory on organic evolution while working on
1. Oenothera lamarckiana
2. Drosophila melanogaster
3. Pisum sativum
4. Althea rosea
At a particular locus, the 'A' allele frequency is 0.6 and that of 'a' allele is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?
| 1. | 0.24 | 2. | 0.16 |
| 3. | 0.48 | 4. | 0.34 |
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Which one of the following amino acids was not found to be synthesized in Miller’s experiment?
1. Glycine.
2. Aspartic acid
3. Glutamic acid
4. Alanine
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An important evidence in favor of organic evolution is the occurrence of
1. Homologous and vestigial organs
2. Analogous and vestigial organs
3. Homologous organs only
4. Homologous and analogous organs
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Which one of the following is not a living fossil?
1. King crab
2. Sphenodon
3. Archaeopteryx
4. Peripatus
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