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This document summarizes key characteristics of different animal phyla. It begins by outlining general animal features like being heterotrophs and multicellular. It then describes the traditional animal phylogenetic tree, which is being revised using molecular data. The five major transitions in body plans are tissues, bilateral symmetry, body cavities, deuterostome development, and segmentation. Specific phyla are then summarized, beginning with sponges which lack tissues, then cnidarians which have tissue

Author

Carlos Alberto Bolivar

Language

EN