Which three conditions are required for evolution by natural selection?
Answer and explanation
Correct answer: A. Variation, heritability and differences in reproductive success
- Step 1: Individuals must differ in traits that can be inherited. Step 2. Some traits must lead to more offspring. Answer: variation, heritability and differential reproductive success. Why not the others: Equal reproduction across all variants prevents directional evolutionary adaptation; acquired somatic characteristics cannot be inherited genetically; and genetic drift causes random allele fluctuations rather than differential survival based on inherited traits.
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