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Principle #1 - Genetic Variation The genetic variation within the moth population is light colored moths and dark colored moths
Principle #2 - Overproduction and the Struggle for Existence Overproduction: Moths have many offspring but only a few survive Struggle for Existence: Light moths struggle to exist because they are being eaten by predators
Principle #3 - Differential survival and Reproduction The dark moths have a higher fitness than the light moths and will therefore survive and reproduce
Principle #4 - Changes in Gene Pool The more advantageous trait will be the dark colored moths, making them more common in the moth population
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