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Population of dark biston betularia incr...

Population of dark biston betularia increased greatly in england from 1848-1898. The selective agent causing the change was

A

tree bark

B

birds

C

human beings

D

toxin from smoke

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The correct Answer is:
A
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ARIHANT NEET-MECHANISM OF EVOLUTION-Chapter Exercises (A) Taking it together (Assorted Questions of the Chapter for Advanced Level Practice )
  1. Natural selection acts on an organism's

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  2. Interdependent genea, with relative functions, form

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  3. Population of dark biston betularia increased greatly in england from ...

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  4. Two individuals from different populations attempt to mate but are una...

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  5. Population of khaibab squirrels on north rim of the grnd canyon do not...

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  6. The kaibib squirrels, described before, are the example of

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  7. Most often the factor that initiates the speciation of two populations...

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  8. In galapagos finches, adaptive radiations occurred…………. Islands, while...

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  9. Since in the pleistocence ice age,deserts have gradually formed in sou...

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  10. Two organisms of different species mate and produce an offspring canno...

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  11. Which of the following cause phenotypic variation among the organisms ...

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  12. Which of the following increases the number of different alleles in a ...

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  13. Natural selection is best defined as occuring when the environment cau...

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  14. Miceoevolution can be measured by compairing observed allelic frequenc...

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  15. In diploid organisms, veriations is not subjected to natural selection...

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  16. People who carry an allele for normal haemoglobin and an allele for si...

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  17. What is the consequence of genetic drift?

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  18. Which one of the following is used for knowing whether or not a popula...

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  19. Many closely related species of marine invertebrates exist on either s...

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  20. Directional selection usuallt acts to favour

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