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Chemistry LibreTexts

Natural Selection in Populations

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  • Populations evolve, not individuals. 

    Let's take a look at the Brightstorm video, Evolution of Populations

    Natural selection can take one of three paths:

    • Directional selection - favors phenotypes at one extreme
    • Stabilizing selection - favors the intermediate phenotype
    • Disruptive selection - favors both extreme phenotypes

    To make sure you're understanding these three types of selection, watch the Teacher's Pet video, Types of Natural Selection