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4 Written questions

3 Multiple choice questions

  1. an organism that obtains organic food molecules by eating other organisms or their byproducts and that cannot synthesize organic compounds from inorganic materials
  2. a fibrous protein that contains sulfur and composes the fibers of the skeleton of some sponges
  3. an asexual reproductive structure produced by some freshwater sponges

3 True/False questions

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

          

  2. choanocytewithin 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. epidermisa fibrous protein that contains sulfur and composes the fibers of the skeleton of some sponges

          

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