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biology test 3!!!

biology test 3!!! - 1 Poriferia(sponges i Calcarea Silicea...

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1) Poriferia (sponges) i) Calcarea, Silicea ii) Lack true tissue/ organs iii) Fresh and marine water iv) Asymmetrical body v) Suspension feeders 2) Cnidarians i) Dipoblastic ii) Radial symmetry iii) Polyp- sessile iv) Medusa- moves passively in water v) Cnidocytes- cells that function in defense b) Hydrozoa i) Man of war ii) Polyp and medusa c) Cubozoa (box jellies, sea wasp) i) Mostly free swimming medusa ii) Box shape, complex eyes d) Anthozoa (sea anemones, corals) i) Only polyp form e) Scyphozoa (jellies, sea nettles) i) Free swimming medusa 3) Lophotrochozoans a) Platyhelminthes (flat worm) (1) Acoelomate (2) Tripoblastula development
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ii) Turbellaria (1) Planaria (2) Light sensitive eye spot (3) Centralized nerve net (4) Gastrovascular cavity (5) 2 way pharynx iii) Trematoda (parasdic) (1) Blood flukes iv) Cestoda (tapeworms) (1) Parasites (2) Proglottids- reproductive structures b) Rotifers i) Pseudocoelomate ii) Parthenogenesis (1) Develop without fertilization iii) Separate mouth and anus c) Mollusca (1) Open circulatory system (a) Heart pumps hemolymph (2) Radula- rasp like feeding organ ii) Polyplacophora (chitons)(many shells, 8 plates) (1) Foot for locomotion (2) Radula (3) No true head iii) Gastropoda (snails, slugs) (1) Asymmetrical body
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(2) Coiled shell (3) Modula, foot for locomotion (4) torsion iv) Bivalvia (clams, mussels, scallops, oysters)(2 shells) (1) No radula (2) Flattened shell with 2 valves (3)
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