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- Living things have variations in their traits that are determined by their genes.
- Some traits can give them an advantage in surviving and finding mates.
- The process of natural selection causes living things to change over generations.
What is a trait and where does an organism get its traits from?
Why do light-fur mice survive LESS often on dark rocks, compared to dark-fur mice?
Explain how natural selection can cause organisms to change over generations.
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