Give one difference and one similarity between natural selection and extinction.

Similarities:

Both natural selection and evolution work on genetic traits in populations rather than individuals. Both natural selection and evolution are involved in generating changes over generations. Both natural selection and evolution result in either extensions or death.

Difference:  

Evolution is a gradual change in the inherited traits of a population over many generations. Natural selection is a mechanism where the members of a population best suited to their environment have the best chance of surviving to pass on their genes

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