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Question

Which of the following statements is true with respect to variation?

A
Variation is minimum in asexual reproduction.
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B
Change in genetic composition will not results in variation.
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C
Selection of variants by environmental factors form the basis of evolutionary process.
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D
Variations are the raw materials for evolutionary forces to act upon.
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Solution

The correct option is C Variations are the raw materials for evolutionary forces to act upon.
Variations are the raw material on which evolutionary forces act upon. All variations are not important in evolution. Only heritable changes which change the genetic material are important in evolution. Asexual reproduction does not involve mixing of gametes. It will give rise to progeny which are identical to their parents. It does not involve variation.
So, the correct answer is option D.

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