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How does geographical isolation help in speciation?

Answer and explanation

Correct answer: It reduces gene flow between separated groups

Geographical barriers such as mountains, rivers, or large distances can prevent members of one population from mating with members of another. Gene flow therefore decreases, while mutation, recombination, drift, and natural selection may cause the separated groups to diverge. If reproductive isolation eventually develops, speciation can occur. Thus option A is correct; isolation does not stop mutations, make organisms identical, or instantly create fossils.

Related tags

Geographical-IsolationSpeciationGene-FlowEvolutionEvolution And SpeciationHeredity And EvolutionScienceClass 10 Mcq

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