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The process of gastrulation allows for the formation of the germ layers in metazoan embryos, and is generally achieved through a series of complex…
Haeckel, Ernst, 1834-1919GastrulationAmphibiansFrogsJohannes Holtfreter made important discoveries about the properties of the organizer discovered by Hans Spemann. Although he spent much time away…
Organizers, EmbryonicBiographyFrogs