1. German biologist and philosopher; advocated Darwinism and formulated the theory of recapitulation; was an exponent of materialistic monism (1834-1919)
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How To Use Haeckel In A Sentence

  • The transcendentalists, of course, conceived evolution, whether real or ideal, as a uniserial process, whereas Haeckel conceived it as multiserial and divergent. Form and Function A Contribution to the History of Animal Morphology
  • I do not feel called upon to characterise the accuracy of the drawings of embryos of different classes of the Vertebrata given by Haeckel in his popular works, and reproduced by Romanes and, for all that I know, other popular exponents of the evolution theory. Haeckel had a point - The Panda's Thumb
  • Everything about Pithecanthropus alalus, or the ‘speechless apeman’ was the product of Haeckel's imagination.
  • Haeckel maintained not only that all vertebrate embryos evolved from a common ancestor, but also that in their development ( "ontogeny") they replay ( "recapitulate") their evolutionary history ( "phylogeny"). Evolution News & Views
  • Already in this first of his generalizations Haeckel implied through the use of the verb bedingen a causal rela - tionship between ontogenesis and phylogenesis. RECAPITULATION
  • According to Haeckel, the origin of the generative products in the mesoderm is a heterotopic phenomenon, for he considers that they must have originated phylogenetically in one of the two primary layers, ectoderm or endoderm. Form and Function A Contribution to the History of Animal Morphology
  • According to Haeckel, the gastrula stage can be found in the development of all animals, and represents the recapitulation of the ancestral metazoan, the Gastraea, a diploblastic animal with a ciliated gut.
  • The "plastidule-soul" and the potentialities of carbon may be sound scientific conceptions, or they may be the reverse, but they are no necessary part of the doctrine of evolution, and I leave their defence to Professor Haeckel. Freie wissenschaft und freie lehr. English
  • Haeckel maintained that the "gastrula" stage occurred in the development of all Metazoa, and that it was typically formed, by invagination, from Form and Function A Contribution to the History of Animal Morphology
  • Ernst Haeckel using the phrase ontogeny recapitulates phylogeny. CreationWiki - Recent changes [en]
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