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| Keywords: Sewertzoff 1939 evolutionary process.png 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 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 Published 1925 “1939 digital picture taken May 12 2006 Aleksey Nikolaevich Severcov Severtsov 23/09/1866 ”19/12/1936 digital photo taken by Alexei Kouprianov none required PD-old-70 Biology diagrams Evolutionary biology 1930s diagrams Process diagrams | ||||
