Ernst Haeckel was a very versatile and complete biologist, equally at home with imaginative leaps of conceptualization, serious natural history in the wild, and meticulous experimentation in embryology. His work shaped the development of a holistic evolutionary perspective that brought ecology, ontogeny, phylogeny, and biogeography together into a unified explanation of the patterns of diversity seen in the living world. He, along with Darwin and Mendel, was perhaps one of the three most consequential biologists of the nineteenthcentury, in many ways the golden age of biology.
Human evolution ontogeny phylogeny ecology embryology
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