Q11 of 52 Page 9

How does the creation of variations in a species promote its survival?

variations in a species arise due to errors in DNA copying. Force of natural selection selects individuals with useful variations in the prevailing enviorment so as to ensure their survival. The individuals with useful variations increase in numbers through differential reproduction in the population.

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Why is the traits acquired during the life-time of an individual not inherited?

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Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Why or why not?