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4 Written questions

3 Multiple choice questions

  1. any of the flagellate cells that line the cavities
  2. an independent and immature form of an organism that is morphologically different from the adult form
  3. a fibrous protein that contains sulfur and composes the fibers of the skeleton of some sponges

3 True/False questions

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

          

  2. epidermisthe outer surface layer of cells of a plant or animal

          

  3. heterotrophwithin 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

          

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