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If you are talking about biological adaptation, an individual can't change its genes to fit the environment better. If two individuals have different genes, one may be more fitted to survive and reproduce. Its genes will be passed on, and the other's won't, so the next generation will be more likely to have the advantageous gene. As this process continues, the population has more and more individuals like this. So, it's the species which adapts, not the individual.

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10y ago

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