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Unformatted text preview: Terms used for Classification of Animals: Parazoa – no tissues/no symmetry (= sponges) Eumetazoa – tissues and symmetry (= everything else) Diploblasts- radial symmetry and only 2 tissue layers (= jellyfish) Triploblasts- all 3 tissue layers (= everything else) Protostomes- mouth develops first from blastopore , spiral cleavage, determinate development (= worms, arthropods, mollusks, etc.) Deuterostomes – anus develops from blastopore, radial cleavage, indeterminate development (= echinoderms and chordates) Evolution of Animals : Common ancestor = colonial flagellated protists; explosion of diversity in the Cambrian period (starting about 543 MYA) with NO significant new innovations in major body plans since...
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This note was uploaded on 09/18/2011 for the course BIO 142 taught by Professor Jarrell during the Spring '11 term at Delgado CC.
- Spring '11