Baer, K. E. von Darwin, C. R. Geoffroy Saint-Hilaire, E. Haeckel, E. H. P. A. Meckel, J. F. Oken, L.
Archetype Cell theory Classification Development Ecology Evolution Evolutionism in mind and society Germ layer theory Morphology Natural system Recapitulation Social Darwinism Spontaneous generation
biologist embryologist naturalist philosopher zoologist
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