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How can geographical isolation become a first step toward speciation?

Answer and explanation

Correct answer: It reduces mixing and breeding between groups and allows different changes to accumulate

Geographical isolation separates populations by barriers such as distance or habitat. Reduced contact means less interbreeding and less exchange of genes between the groups. Mutations, natural selection, and genetic drift can then produce different trait frequencies in each environment. Over many generations, these differences may contribute to reproductive isolation and speciation. Option A correctly describes this first step; the other options are biologically unsupported extremes.

Related tags

Geographical-IsolationSpeciationEvolutionEvolution And SpeciationHeredity And EvolutionScienceClass 10 Mcq

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