Bio II Final Practical.
Bio II Final Practical. Pseudocoelomates - coelom is derived from both the endoderm and the mesoderm ie. rotifers and roundworms (hookworms) Eucoelomates - True coelomates - derived from only mesodermal tissues. [27] Phylum Porifera - -sponge -Multicellular; no tissues/organs -can vary from radially symmetrical to irregularly shaped.
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