Biological Evolution Concepts

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Natural Selection

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Organisms better adapted to their environment survive and reproduce.

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Adaptation

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Change that makes an organism better suited to its environment.

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Speciation

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Formation of new and distinct species.

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Mutation

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Change in gene structure leading to variant forms.

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Allele Frequency

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Relative frequency of an allele at a locus in a population.

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Phylogeny

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Evolutionary history of an organism.

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Homologous Structures

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Structures from a common ancestor.

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Embryology

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Study of embryos and their development

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Biogeography

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Distribution of species and ecosystems in geographic space and time

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Convergent Evolution

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Organisms not closely related evolve similar traits