For variation to be a meaningful contribution to evolution, what must be true?

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Quizplus · Accepted Answer

Variation that is meaningful for evolution refers to the differences in traits that can be passed down through generations, indicating a genetic basis. If the variation in traits is purely non-genetic, it would not contribute to evolution, as those traits would not be passed down to offspring. Additionally, while genetic mutation can be a source of variation, it is not the only way that variation can occur. Other factors such as gene flow, genetic recombination, and natural selection can also contribute to variation.

For Variation to Be a Meaningful Contribution to Evolution, What