Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel
Carl Wilhelm von Nägeli (March 26 or 27, 1817 - May 10, 1891) was a Swiss botanist. He studied cell division and pollination. Among his other contributions to science were a series of papers in the Zeitschrift für wissenschaftliche Botanik (1844-46); Die neueren Algensysteme (1847); Gattungen einzelliger Algen (1849); Pflanzenphysiologische Untersuchungen (1855-58), with Carl Eduard Cramer; Beiträge zur wissenschaftlichen Botanik (1858-68); a number of papers contributed to the Royal Bavarian Academy of Sciences, forming three volumes of Botanische Mitteilungen (1861-81); and, finally, his volume, Mechanisch-physiologische Theorie der Abstammungslehre, published in 1884. Nägeli is best known for his unproductive and discouraging correspondence with Gregor Mendel concerning the latter's celebrated work on Pisum sativum, the garden pea. He was an advocate of orthogenesis and an opponent of Darwinism. He developed an ""inner perfecting principle"" which he believed directed evolution. He wrote that many evolutionary developments were nonadaptive and variation was internally programmed. He died in 1891 at the age of 74. No photographer credited, undated.
