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4 Written questions

3 Multiple choice questions

  1. one of the small openings in a sponge's body through which water enters
  2. a fibrous protein that contains sulfur and composes the fibers of the skeleton of some sponges
  3. within the body wall of a sponge, a specialized cell that crawls about and delivers nutrients from the choanocytes to the rest of the body cells

3 True/False questions

  1. osculumone of the small openings in a sponge's body through which water enters

          

  2. epidermisa needle of silica or calcuim carbonate in the skeleton of some sponges

          

  3. spiculean asexual reproductive structure produced by some freshwater sponges

          

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