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Ernst Haeckel was born on 16 February 1834, in Potsdam (then part of the Kingdom of Prussia). [12] In 1852 Haeckel completed studies at the Domgymnasium , the cathedral high-school of Merseburg .
The theory of recapitulation, also called the biogenetic law or embryological parallelism—often expressed using Ernst Haeckel's phrase "ontogeny recapitulates phylogeny"—is a historical hypothesis that the development of the embryo of an animal, from fertilization to gestation or hatching (), goes through stages resembling or representing successive adult stages in the evolution of the ...
Ernst Haeckel, a.k.a. Häckel (5 April 1890 in Gemünden am Main – 26 September 1967) was a German general who was awarded the Knights Cross of the Iron Cross. [1]After the end of the war he contributed to military studies of the war for the American military, which are available at NARA:
Because it shows relationships (phylogeny) and time (generations), it is a timetree. In contrast, Ernst Haeckel illustrated a phylogenetic tree (branching only) in 1866, not scaled to time, and of real species and higher taxa. In his summary to the section, Darwin put his concept in terms of the metaphor of the tree of life:
Romanes' 1892 copy of Ernst Haeckel's allegedly fraudulent embryo drawings (This version of the figure is often attributed incorrectly to Haeckel.) [1]. Haeckel's illustrations show vertebrate embryos at different stages of development, which exhibit embryonic resemblance as support for evolution, recapitulation as evidence of the Biogenetic Law, and phenotypic divergence as evidence of von ...
The center and bottom-center images are Desmonema annasethe; the tentacles reminded Haeckel of his late wife's long flowing hair. [1] Kunstformen der Natur (known in English as Art Forms in Nature) is a book of lithographic and halftone prints by German biologist Ernst Haeckel.
Evolutionary progress as a tree of life. Ernst Haeckel, 1866 Lamarck's two-factor theory involves 1) a complexifying force that drives animal body plans towards higher levels (orthogenesis) creating a ladder of phyla, and 2) an adaptive force that causes animals with a given body plan to adapt to circumstances (use and disuse, inheritance of acquired characteristics), creating a diversity of ...
Embryology theories of Ernst Haeckel (following Meckel) and Karl Ernst von Baer compared. Von Baer denied any recapitulation of whole adult forms, though individual structures might be recapitulated.
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