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Biology 16 Online
OpenStudy (anonymous):

Where should the origin of jointed appendages be placed on the phylogenetic tree?

OpenStudy (anonymous):

Welcome to OpenStudy @colored_nails !

OpenStudy (beccaboo333):

http://biology.unm.edu/ccouncil/Biology_203/Summaries/Protostomes.htm This link might help you out.

OpenStudy (anonymous):

Crud, @beccaboo333 beat me lol.

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