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

3 True/False questions

  1. larvaean independent and immature form of an organism that is morphologically different from the adult form

          

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

          

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