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4 Written questions

3 Multiple choice questions

  1. the outer surface layer of cells of a plant or animal
  2. an opening in a sponge's body through which water exits
  3. an organism that obtains organic food molecules by eating other organisms or their byproducts and that cannot synthesize organic compounds from inorganic materials

3 True/False questions

  1. ostiaa fibrous protein that contains sulfur and composes the fibers of the skeleton of some sponges

          

  2. larvaeone of the small openings in a sponge's body through which water enters

          

  3. sponginone of the small openings in a sponge's body through which water enters