How can geographical isolation help in speciation?
Answer and explanation
Correct answer: It reduces interbreeding between groups and allows different changes to accumulate
Geographical isolation separates populations through barriers such as mountains, rivers or distance. Because the groups meet and interbreed less often, gene flow between them decreases. Mutations, inherited variations, natural selection and genetic drift may then produce different features in the separate environments. If reproductive isolation eventually develops, the populations may become distinct species. Thus option A is correct; isolation does not instantly remove genes or cause universal sterility.
Frequently asked questions
What is the correct answer to this question?
It reduces interbreeding between groups and allows different changes to accumulate
Why is this the correct answer?
Geographical isolation separates populations through barriers such as mountains, rivers or distance. Because the groups meet and interbreed less often, gene flow between them decreases. Mutations, inherited variations, natural selection and genetic drift may then produce different features in the separate environments. If reproductive isolation eventually develops, the populations may become distinct species. Thus option A is correct; isolation does not instantly remove genes or cause universal sterility.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Evolution and speciation.
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