Which statement is NOT one of Charles Darwin's proposed criteria for traits to evolve through natural selection?

Question

BlackTom AI · Accepted Answer

Natural selection requires heritable variation that influences reproductive success. Darwin’s essential criteria (as interpreted in modern terms) are: (1) individuals within a population vary in traits, (2) at least some of that variation is heritable (can be passed to offspring), and (3) variation affects survival and/or reproduction so that some variants leave more offspring (differential fitness).

Step-by-step evaluation of the four choices:
1. "The trait must be inheritable." — This matches Darwin’s requirement that advantageous traits be passed to offspring. Without inheritance, a favorable feature cannot accumulate across generations, so this statement is a correct Darwinian criterion.
2. "The trait must vary." — Variation among individuals is the raw material for selection. If every individual were identical, selection has nothing to act on. This is also a correct criterion.
3. "The trait must make the individual more fit to survive" — Darwinian selection requires differential reproductive success; traits that increase survival or reproduction (fitness) tend to become more common. This restates the fitness criterion and is correct.
4. "The trait must be able to be learned." — Learning is an acquired change within an individual’s lifetime. Such acquired traits are generally not encoded in germline DNA and therefore are not reliably passed to offspring by genetic inheritance. Darwin’s mechanism depends on inherited variation, not on traits acquired and learned during an individual’s life (this idea is more akin to Lamarckian inheritance or cultural transmission, not classical natural selection).

Why the correct answer is correct: the only statement that is NOT one of Darwin’s proposed criteria is that the trait must be able to be learned, because learned (acquired) traits don’t satisfy the heritability requirement central to natural selection.

Therefore, the correct choice is: "The trait must be able to be learned." This matches the provided answer.

Which statement is NOT one of Charles Darwin's proposed criteria for traits to evolve through natural selection?未知题型

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