Edward Bagnall Poulton
Sir Edward Bagnall Poulton, FRS was a British evolutionary biologist who was a lifelong advocate of natural selection through a period in which many scientists such as Reginald Punnett doubted its importance. He invented the term sympatric for evolution of species in the same place, and in his book The Colours of Animals was the first to recognize frequencydependent selection.
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Source: Wikipedia