What may be necessary in separated groups for speciation?
Answer and explanation
Correct answer: Accumulation of different changes for a long time
Speciation generally requires separated populations to accumulate genetic differences over many generations. Different environments, mutations, natural selection and limited gene flow can make the groups increasingly distinct. If these differences eventually produce reproductive isolation, the populations may be recognized as separate species. Option A captures this gradual process. Immediate sameness, chromosome loss or permanent absence of reproduction would not explain the formation of a new species.
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What is the correct answer to this question?
Accumulation of different changes for a long time
Why is this the correct answer?
Speciation generally requires separated populations to accumulate genetic differences over many generations. Different environments, mutations, natural selection and limited gene flow can make the groups increasingly distinct. If these differences eventually produce reproductive isolation, the populations may be recognized as separate species. Option A captures this gradual process. Immediate sameness, chromosome loss or permanent absence of reproduction would not explain the formation of a new species.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: How do Organisms Reproduce. Topic: Fertilization and development.
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