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5 Written Questions

1. 3 part body- head, thorax, abdomen, has a pair of antennae, 3 pairs of legs
2. snails, slugs, oysters, clams, octopuses, squids
3. roundworms
4. unique rasping organ that scrapes food
5. aquatic, lobsters, crayfish, crabs, shrimps, barnacles, krill...

5 Matching Questions

1. foot
2. Antigen
3. echinodermata
4. cephalopods
5. gastropods, bivalves, and cephalopods are all

1. a shell can be small/missing/internal, and mouth is at base of foot, and radula
2. b muscular, functions in locomotion
3. c a protein on the surface of bacteria that the body recognizes so it can later remember it
4. d sea stars, sand dollars, slow moving, sessile marine animals, water vascular system
5. e the major classes of molluscs

5 Multiple Choice Questions

1. digestive compartment where waste exits the mouth
   1. gastropods
   2. gastrovacular cavity
   3. visceral mass
   4. radula
2. scorpions, ticks, spiders, insects, mites
   1. echinodermata
   2. visceral mass
   3. chelicerates/arachnids
   4. crustaceans
3. belly foot, single spiraled shell
   1. arthropoda
   2. cephalopods
   3. nematoda
   4. gastropods
4. contains most of the internal organs
   1. cephalopods
   2. bivalves
   3. visceral mass
   4. gastropods
5. jointed appendages, hard exoskeleton, head, thorax, abdomen, open circulatory system
   1. cephalopods
   2. gastropods
   3. nematoda
   4. arthropoda

5 True/False Question

1. platyhelminthes → fold of tissue that drapes over the visceral mass like a shell
   

   True        False

2. medusa → umbrella shape, fringe of tentacles around lower edge (jelly)
   

   True        False

3. sessile → fold of tissue that drapes over the visceral mass like a shell
   

   True        False

4. Cnidaria → radial symmetry + 2 tissue layers
   

   True        False

5. spiders have 8 legs and therefore: → flatworms w/ a gastrovacular cavity
   

   True        False