Why is genetic variation within a species critical for long-term survival in changing climatic environments?
Answer and explanation
Correct answer: D. It provides the raw allelic diversity necessary for natural selection to act upon
- Step 1: Natural selection cannot operate without pre-existing phenotypic variation arising from genetic diversity. Step 2. When environmental conditions change, individuals possessing advantageous alleles survive and reproduce, preventing species extinction. Answer: It provides the raw allelic diversity necessary for natural selection to act upon. Why not the others: Genetic variation does not stop mutations or make individuals identical.
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