Q. 155.0( 2 Votes )

Which of the following statements is not true with respect to variation?
A. All variations in a species have equal chance of survival

B. Change in genetic composition results in variation

C. Selection of variants by environmental factors forms the basis of evolutionary processes.

Variation is minimum in asexual reproduction

Answer :

Variation means certain changes which occur in sexually reproducing organisms because of errors in DNA copying. Variations are beneficial for species because they increase the adaptability of an organism to its changing environmental conditions. The variations produced in organisms during successive generations gets accumulated in the organism. The significance of variations shows up only if it continues to be inherited by the offspring for several generation.

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