Why may isolation alone not be enough for speciation?
Answer and explanation
Correct answer: Because genetic differences must also accumulate
Isolation reduces gene flow, but it does not by itself guarantee that separated populations will become different species. Speciation generally requires inherited genetic divergence to accumulate through mutation, recombination, drift and selection, eventually leading to reproductive isolation. Hence option A is correct. B is the opposite of divergence, while C and D make absolute biological claims that are false; isolated populations can still reproduce within their own groups.
Frequently asked questions
What is the correct answer to this question?
Because genetic differences must also accumulate
Why is this the correct answer?
Isolation reduces gene flow, but it does not by itself guarantee that separated populations will become different species. Speciation generally requires inherited genetic divergence to accumulate through mutation, recombination, drift and selection, eventually leading to reproductive isolation. Hence option A is correct. B is the opposite of divergence, while C and D make absolute biological claims that are false; isolated populations can still reproduce within their own groups.
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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