Exam (elaborations)
USABO Biosystematics Questions and Verified Answers | Passed | A+
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Calcarea, Silicea (sponges) : Lack true tissues; have choanocytes (collar cells-flagellated cells that ingest bacteria and tiny food particles) Cnidaria (hydras, jellies, sea anemones, corals) : Unique stinging structures (nematocysts) housed in special cells (cnidocytes); diploblastic, radi...
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