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Toward a New Philosophy of Biology: Observations of an Evolutionist

Book by Ernst Mayr · 9 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.”

“I had found again and again that the most aberrant population of a species - often having reached species rank, and occasionally classified even as a separate genus - occurred at a peripheral location, indeed usually at the most isolated peripheral location.”

“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.”