Quotes About Phylogenesis

Phylogenesis is the mechanical cause of ontogenesis.1 In other words, the development of the stem, or race, is, in accordance with the laws of heredity and adaptation, the cause of all the changes which appear in a condensed form in the evolution of the fœtus.

Ontogenesis, or the development of the individual, is a short and quick recapitulation of phylogenesis, or the development of the tribe to which it belongs, determined by the laws of inheritance and adaptation.