Which sequence best describes natural selection?
Answer and explanation
Correct answer: A. variation exists, some individuals are better adapted and survive to reproduce, and their alleles become more common
- Step 1: Individuals in a population differ because of random mutations and sexual reproduction.
- Step 2: Those with advantageous alleles are more likely to survive and reproduce, so those alleles increase in frequency.
Answer
variation exists, some individuals are better adapted and survive to reproduce, and their alleles become more common.
Why not the others: individuals need a feature, so they develop it during their lifetime and pass it to offspring: describes Lamarckian inheritance of acquired characteristics. the environment causes mutations that match its demands, and all individuals change together: mutations are random and do not match the environment. the strongest individuals always survive and the rest die before adulthood: selection favours better adapted individuals, not simply the strongest.
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