Standard 17 Natural Selection

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What are the three types of natural selection?

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1. Stabilizing Selection: Favors average traits. 2. Directional Selection: Favors one extreme trait. 3. Disruptive Selection: Favors both extreme traits.

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What is an adaptation?

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An adaptation is a variation that helps a species survive in its environment.

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What is stabilizing selection?

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Stabilizing selection is a type of natural selection that favors average traits and reduces variation.

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What is directional selection?

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Directional selection is a type of natural selection that favors one extreme phenotype over others.

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What is disruptive selection?

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Disruptive selection is a type of natural selection that favors extreme traits at both ends of the spectrum.

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What is a structural adaptation?

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A structural adaptation is a physical feature of an organism that enhances its survival, such as a giraffe's long neck.

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What is a physiological adaptation?

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A physiological adaptation involves internal body processes that enhance survival, such as the ability to regulate body temperature.

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What is a behavioral adaptation?

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A behavioral adaptation is a change in behavior that helps an organism survive, such as migration in birds.

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What is variation in a population?

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Variation refers to the differences in traits among individuals in a population.