Dictionary of Human Evolution and Biology

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Biological Evolution

1. change in a lineage of an organism through time (É. Geoffroy Saint-Hilaire, 1831); transformism.

2. descent with modification (Darwinism, 1859).

3. the transformation of the form and mode of existence of an organism in such a way that descendants differ from their predecessors.

4. change in a population’s allele frequencies between generations (this also called the operational definition of neo-Darwinism).

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