Unit 8 : Adaptations and Homology

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Vestibular Structure

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Anatomical features or behaviors that were once functional in an organism's ancestors but have lost their original function through evolution and are now reduced or non-functional.

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Population

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The total number of individuals residing in a specific area.

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Adaptation

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A special feature or behavior that helps a living thing to survive and do well in its environment.

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Natural Selection

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A process that causes species to evolve over time.

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Anatomical Homology

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Similarities in anatomical structures among different species, indicating common ancestry.

Front

Molecular Homology

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Similarities in the molecular structure of genes or proteins among different species, indicating evolutionary relationships.

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Analogous Structure

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Structures in different species that serve similar functions but evolved independently, not from a common ancestor.

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Biological Evolution

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The change in the inherited characteristics of biological populations over successive generations.

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Gene Flow

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The transfer of genetic material between populations, which can affect genetic diversity.

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Mutation

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A change in the DNA sequence of an organism's genome, which can lead to new traits.