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What is the best basis for distinguishing natural selection from genetic drift?

Answer and explanation

Correct answer: Usefulness is central in selection and chance is central in drift

The governing distinction is the cause of change in allele or trait frequency. In natural selection, environmental conditions favour some heritable variations because they improve survival or reproduction. In genetic drift, frequencies change randomly, especially in small populations, without regard to usefulness. Therefore option A is correct. Food may be one environmental factor, but it does not define both processes, and drift is not restricted to large organisms.

Related tags

Natural-SelectionGenetic-DriftEvolutionHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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