Natural Selection

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Evoultion is the slow and continuous change of organisms from one generation to the next. Charles Darwin come up with the theory of natural selection to explain how evoultion occurs. It works like this:

1. Individuals are not all the same because of differences in their genes. So their is Variation within populations of organisms

2. Most organisms give birth to more young than can survive to adulthood

3. But populations don't generally increase quickly in size becuase individuals have to

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