BIO 182 LAB FINAL Exam Questions and Correct Answers

Phylum Porifera Characteristics Answer- - sponges - considered the basal animal - sessile animals - lack true tissues -filter feeders -hermaphrodites phylum Cnidaria characteristics Answer- - have true tissues -gastrovascular cavity -ring of tentacles with cnidocytes to capture prey - polys and medusa phylum Platyhelminthes Answer- flatworms -dorsoventrally flattened bodies - Flat shape increases surface area for nutrient, gas, and waste exchange - Found in marine, freshwater, and damp terrestrial habitats - Schistosomiasis is a disease from trematodes that causes pain, anemia, and diarrhea phylum Annelida Answer- - segmented worms -found in salt water and fresh water and damp soil Two main groups: -Errantians: well developed head, parapodia with chaetae -Sedentarians: reduced head, no parapoida phylum Mollusca Answer- - Have 3 main body parts: Muscular foot, visceral mass, and a mantle - clade polyplacophora (chitons) -clade gastropoda -clade bivalvia - clade cephalopoda phylum Nematod