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In which situation can both natural selection and genetic drift change the structure of a population?

Answer and explanation

Correct answer: When variations exist and some changes increase by advantage or chance

Population structure changes when the frequencies of inherited traits or alleles change across generations. Natural selection increases variants that improve survival or reproduction, whereas genetic drift changes frequencies randomly, especially in small populations. Both processes therefore require heritable variation and reproduction. Option A includes both advantage, representing selection, and chance, representing drift. Without variation or offspring, these evolutionary changes cannot be sustained.

Related tags

Natural SelectionGenetic DriftPopulation VariationHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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