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evolution:phylogenesis as mirror of ontogenesis?

Sarah at teleport.com lfitz at teleport.com
Wed Jan 29 02:33:54 EST 1997


Biologist used to say that "ontogeny recapitulates phylogeny"  an
invertebrate taxonomist that I know  says "no more" . But I don't know why.

Ontogeny being the stages in  embryonic development and phylogeny the
stages in evolutionary development. For instance: a developing embryo
resembles a fish  at one point because it has gill slits and at another
stage an amphibian, both susposed stages in the evolutionary development
chain. 




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