BIOL 1202 Midterm: Test 4 Notes
Document Summary
Concept 33. 1: sponges that are basal animals that lack true tissues: porifera, live in both fresh and marine waters, lack true tissues and organs, asymmetrical body plan sponges are suspension feeders, filter water passing through their bodies. Cnidarian body plans polyp form is generally sessile (stays in one place: medusa form moves freely in water by passive drifting and contractions of the bell figures 33. 5. Defining feature of cnidarians cnidocytes: unique cells that function in defense and the capture of prey stimulus causes the cell to evert releasing thread some cnidocytes sting, others just entangle prey figure 33. 6. Flatworms phylum platyhelminthes tripoblastic development, but acoelomate table 33. 2. Spongebob is a member of which phylum: cnidaria, porifera, platyhelminthes, lophophora. In the life cycle of a typical cnidarian, which of the following would most likely be free swimming: polyp, medusa, cnidocytes, cercaria. Phylum mollusca: most molluscs have an open circulatory system, redula: rasp-like feeding organ, scrapes, and scoops -food items figure 33. 15.
