6 Written Questions

1. small pores in a sponge's body wall through which water enters the body
2. free-swimming, jelly like, often umbrella shaped body form of a cnidarian; jelly fish
3. unique flagellated cell with a collar-like structure, found in sponges
4. clusters of amoebocytes encased in a protective coat; produced by freshwater sponges in cold or dry weather
5. flexible, structural protein fibers in the mesoglea of most sponges
6. describes an organism that remains attached to a surface for its entire life

6 Multiple Choice Questions

1. large pores in a sponge's body wall which water exits the body
   1. medusa
   2. oscula
   3. spicule
   4. ostia
2. a small area on hydra that secretes a sticky substance, which enables them to adhere to rocks or plants in the water
   1. spongin
   2. basal disk
   3. sessile
   4. medusa
3. cylindrical, pipe-shaped body form of a cnidarian, usually attached to a rock or an other object
   1. ostia
   2. spongin
   3. polyp
   4. fluke
4. needle of silica or calcium carbonate in the skeleton of some sponges
   1. sessile
   2. gemmule
   3. oscula
   4. spicule
5. rectangular body section of tapeworms
   1. proglottid
   2. polyp
   3. ostia
   4. planula
6. barbed harpoon within a cnidocyte of a cnidarian; used to spear prey
   1. cnidocyte
   2. amoebocyte
   3. nematocyst
   4. choanocyte

5 True/False Questions

1. fluke → free-swimming larva that developed from cnidarian zygotes

   True        False

2. amoebocyte → amoeba-like cell that supplies nutrition and removes wastes from sponge body cells

   True        False

3. tegument → thick protective covering of endoparasite cells that helps prevent their being digested by their host

   True        False

4. cnidocyte → stinging cell used by cnidarians to stun prey

   True        False

5. planula → large pores in a sponge's body wall which water exits the body

   True        False