In the 1900s, (Ethologists/Comparative Biologists) were based in North America, while (Ethologists/Comparative Biologists) were based in Europe.

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asked Jan 28, 2019 37.5k views

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Jmcnevin · Answer 1 · 2019-02-03T09:22:47+0000

In the 1900s, Comparative Biologists were based in North America, while Ethologists were based in Europe. Hope that help!