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Apr 23 2007, 4:10 AM EDT ishida
 
 edit 558 words added
Change: Many animals have evolved complex nervous systems throughout the course of evolution, but their architectures can differ substantially between species. While vertebrates have a CNS   View changes from previous version. (Word count: 569)
Apr 23 2007, 4:08 AM EDT ishida
 
 create No content added or deleted.