What Evolution Is by Ernst Mayr

An accessible overview of evolutionary biology that explains how variation, heredity, and natural selection drive adaptation and speciation; reviews evidence from fossils, biogeography, comparative anatomy, and molecular genetics; clarifies the species concept and population thinking; distinguishes micro- from macroevolution; examines the origin and diversification of life, including humans; and addresses common misconceptions by showing how evolutionary hypotheses are tested within the modern synthesis.

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