- 1(current)
Q. No.Mark the correct statement with respect to industrial melanism:
| 1. | Lichens can be used as an industrial pollution indicator. |
| 2. | Low count of melanic moths are found in rural areas where industrialisation did not occur. |
| 3. | Neither grey nor the dark variety of moths has been completely wiped out. |
| 4. | All of these |
Subtopic: Â Additional Theories of Darwin |
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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
Subtopic: Â Additional Theories of Darwin |
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The excess use of herbicides and pesticides etc. has resulted in selection of resistant varieties in a much lesser time. Hence, resistant organisms/cells are appearing in a time span of months or years and not centuries. This statement is:
| 1. | In favour of evolution by anthropogenic action |
| 2. | Against the natural selection theory |
| 3. | In favour of sexual selection theory |
| 4. | In favour of genetic drift |
Subtopic: Â Additional Theories of Darwin |
 84%
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