Natural Selection - Descent with Modification

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12 Terms

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Descent with Modification

species change over generations as they inherit traits from their ancestors.

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Evolution
The change in genetic makeup of a population over time.
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Adaptation
A trait, structure, function, or behavior that gives the organism an evolutionary advantage.
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Phenotype
The expressed or physical trait of an organism.
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Genotype
The actual genetic makeup that results in an expressed phenotype.
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Gene Pool
The actual frequency of each type of gene in a population.
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Population
The smallest unit that can evolve.
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Natural Selection
The process by which the environment acts on the phenotype of an organism.
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Adaptive Radiation
A process in which organisms diversify rapidly into a multitude of new forms.
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Directional Selection
A mode of natural selection where the environment selects for one extreme.
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Stabilizing Selection
A mode of natural selection where the environment selects for the intermediate.
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Disruptive Selection
A mode of natural selection where the environment selects for both extremes.