How does geographical isolation increase the possibility of forming a new species?
Answer and explanation
Correct answer: Different genetic changes can accumulate in separated groups
Geographical isolation separates populations and reduces gene flow between them. Once exchange of genes is limited, mutation, recombination, genetic drift and natural selection can act differently in the separate environments. Over many generations, inherited differences may accumulate and reproductive isolation may develop, producing speciation. Thus A is correct. B, C and D contradict the effects of isolation or describe impossible immediate changes.
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What is the correct answer to this question?
Different genetic changes can accumulate in separated groups
Why is this the correct answer?
Geographical isolation separates populations and reduces gene flow between them. Once exchange of genes is limited, mutation, recombination, genetic drift and natural selection can act differently in the separate environments. Over many generations, inherited differences may accumulate and reproductive isolation may develop, producing speciation. Thus A is correct. B, C and D contradict the effects of isolation or describe impossible immediate changes.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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