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Toward a New Philosophy of Biology: Observations of an Evolutionist

Book by Ernst Mayr · 4 quotes · Population, Evolution, Species

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Toward a New Philosophy of Biology: Observations of an Evolutionist Quotes

“As a consequence, geneticists described evolution simply as a change in gene frequencies in populations, totally ignoring the fact that evolution consists of the two simultaneous but quite separate phenomena of adaptation and diversification.”

“A new species develops if a population which has become geographically isolated from its parental species acquires during this period of isolation characters which promote or guarantee reproductive isolation when the external barriers break down.”