WebThe 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 …

Web"Tetracorallia" from Ernst Haeckel's Kunstformen der Natur, 1904. Cross-section of Stereolasma rectum, a rugose coral from the Middle Devonian of Erie County, New York. The rugosa, also called the tetracorallia or horn coral, are an extinct order of solitary and colonial corals that were abundant in Middle Ordovician to Late Permian seas.

WebErnst Alfred Cassirer (/ k ɑː ˈ s ɪər ər, k ə ˈ-/ kah-SEER-ər, kə-, German: [ˈɛʁnst kaˈsiːʁɐ]; July 28, 1874 – April 13, 1945) was a German philosopher. Trained within the Neo-Kantian Marburg School, he initially followed his mentor Hermann Cohen in attempting to supply an idealistic philosophy of science.. After Cohen's death in 1918, Cassirer developed a …

WebLemuria bezeichnet einen hypothetischen bzw. fiktiven versunkenen Kontinent oder eine Landbrücke, die entweder zwischen Madagaskar und Indien oder zwischen Australien und Amerika gelegen haben soll. Lemuria spielt heute vor allem in der Science-Fiction-Literatur und in der Esoterik eine Rolle. Die Annahme solcher Landbrücken war bis zur …

WebErnst Karl Abbe HonFRMS (23 January 1840 – 14 January 1905) was a German physicist, optical scientist, entrepreneur, and social reformer.Together with Otto Schott and Carl Zeiss, he developed numerous optical instruments.He was also a co-owner of Carl Zeiss AG, a German manufacturer of scientific microscopes, astronomical telescopes, planetariums, …

WebLa page Wikipédia Articles à créer vise à coordonner les efforts des contributeurs et recenser dans ses pages de rubrique les articles potentiellement admissibles à créer ou traduire.. Cette page ne doit pas être éditée pour suggérer un article. Merci de consulter les conseils relatifs à la création des articles et les critères (admissibilité des articles, …

WebHaeckel. Ernst Haeckel (1834–1919) constructed several trees of life. His first sketch, in the 1860s, shows "Pithecanthropus alalus" as the ancestor of Homo sapiens.His 1866 tree of life from Generelle Morphologie der Organismen shows three kingdoms: Plantae, Protista and Animalia. This has been described as "the earliest 'tree of life' model of biodiversity".

WebThe science that tries to reconstruct phylogenetic trees and thus discover clades is called phylogenetics or cladistics, the latter term coined by Ernst Mayr (1965), derived from "clade". The results of phylogenetic/cladistic analyses are tree-shaped diagrams called cladograms; they, and all their branches, are phylogenetic hypotheses.. Three methods …

WebErnst Haeckel. Ernst Haeckel. Like most of Darwin's supporters, [citation needed] Ernst Haeckel (1834–1919) put forward a doctrine of evolutionary polygenism based on the ideas of the linguist and polygenist August Schleicher, in which several different language groups had arisen separately from speechless prehuman Urmenschen (German for ...

WebGeorges-Louis Leclerc, Comte de Buffon (French: [ʒɔʁʒ lwi ləklɛʁ kɔ̃t də byfɔ̃]; 7 September 1707 – 16 April 1788) was a French naturalist, mathematician, cosmologist, and encyclopédiste. His works influenced the next two generations of naturalists, including two prominent French scientists Jean-Baptiste Lamarck and Georges Cuvier.Buffon …

WebErnst Haeckel's recapitulation theory During the late 19th century, Ernst Haeckel 's recapitulation theory , or "biogenetic fundamental law", was widely accepted. It was often expressed as " ontogeny recapitulates phylogeny", i.e. the development of a single organism during its lifetime, from germ to adult, successively mirrors the adult stages ...

WebIn fluid dynamics, a Kármán vortex street (or a von Kármán vortex street) is a repeating pattern of swirling vortices, caused by a process known as vortex shedding, which is responsible for the unsteady separation of flow of a fluid around blunt bodies.. It is named after the engineer and fluid dynamicist Theodore von Kármán, and is responsible for such …

WebAsexual reproduction in starfish takes place by fission or through autotomy of arms. In fission, the central disc breaks into two pieces and each portion then regenerates the missing parts. In autotomy, an arm is shed with part of the central disc attached, which continues to live independently as a "comet", eventually growing a new set of arms.

WebBiology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary information encoded in genes, which can be transmitted to future generations.Another major theme is evolution, which explains …