How can geographical isolation become a first step toward speciation?
Answer and explanation
Correct answer: It reduces mixing and breeding between groups and allows different changes to accumulate
Geographical isolation separates populations by barriers such as distance or habitat. Reduced contact means less interbreeding and less exchange of genes between the groups. Mutations, natural selection, and genetic drift can then produce different trait frequencies in each environment. Over many generations, these differences may contribute to reproductive isolation and speciation. Option A correctly describes this first step; the other options are biologically unsupported extremes.
Frequently asked questions
What is the correct answer to this question?
It reduces mixing and breeding between groups and allows different changes to accumulate
Why is this the correct answer?
Geographical isolation separates populations by barriers such as distance or habitat. Reduced contact means less interbreeding and less exchange of genes between the groups. Mutations, natural selection, and genetic drift can then produce different trait frequencies in each environment. Over many generations, these differences may contribute to reproductive isolation and speciation. Option A correctly describes this first step; the other options are biologically unsupported extremes.
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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