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File:Sewertzoff 1939 evolutionary process.png

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Description Diagram, showing the modes of the evolutionary process: aromorphosis, idioadaptation, and general degeneration. AROMORPHOSIS: new forms emerge in relations with environment and stay when the demands are no longer present (moving to the new plane). IDIOADAPTATION: new forms emerge in relations with environment and disappear when the demands are no longer present (staying in the same plane).
Date Published 1925–1939, digital picture taken May 12, 2006
Source Severcov, Aleksey N. Morfologicheskie zakonomernosti evoliutsii. (Morphological principles of evolution) Moscow—Leningrad, Acad. Sci., 1939. 610 p. Diagram XXII at the p. 330, first published in Glavnye napravlenia evolucionnogo processa (Main directions of evolutionary process), Moscow, 1925. Based on Severcov's earlier works on evolution morphology Etudi po teorii evolucii (Etudes on theory of evolution) (1911 and 1912)
Author Aleksey Nikolaevich Severcov (Severtsov) (23/09/1866—19/12/1936), digital photo taken by Alexei Kouprianov

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current21:18, 13 May 2006Thumbnail for version as of 21:18, 13 May 20061,250 × 600 (11 KB)Alexei Kouprianov (talk | contribs){{Information| |Description=Diagram, showing the modes of the evolutionary process: aromorphosis, idioadaptation, and general degeneration. |Source='''Sewertzoff, Nikolai A.''' ''Morfologicheskie zakonomernosti evoliutsii.'' (Morphological principles of e

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