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BIO 1407: Lab Exam 3 Review
\Q\.Sponge
Phylum Porifera, common name
\.None
Phylum Porifera symmetry
\Q\.None
,Phylum Porifera circulatory system
\Q\.No true tissues
Phylum Porifera # of germ layers
, \Q\.Spicules
small, spike shaped particles of calcium carbonate or silicon dioxide that make up the skeleton
of some sponges
\Q\.