Answer :
Final answer:
Heritable variation is crucial for evolution by natural selection, enabling individuals to adapt and survive in changing environments.
Explanation:
Heritable variation refers to the diversity in traits that can be passed from parents to offspring through genes. This variation is essential for evolution by natural selection as it allows for individuals to adapt to changing environments, increasing the chances of survival and reproduction. While heritable variation can include traits that are beneficial, neutral, or harmful, it is the favorable variations that are more likely to be passed on through generations.
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