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In a small isolated group, some traits become more common only by chance. This situation is related to which evolutionary idea?

Answer and explanation

Correct answer: Genetic drift

Genetic drift is the random change in the frequency of alleles or traits within a population. Its effect is especially strong in small, isolated populations, where chance events can make a trait common or remove it even when the trait provides no survival advantage. Therefore, option A is correct. Digestion, respiration and photosynthesis are life processes, not mechanisms that explain random changes in inherited traits.

Related tags

Genetic DriftSmall PopulationEvolutionHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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