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4 Written questions

3 Multiple choice questions

  1. an asexual reproductive structure produced by some freshwater sponges
  2. an organism that obtains organic food molecules by eating other organisms or their byproducts and that cannot synthesize organic compounds from inorganic materials
  3. any of the flagellate cells that line the cavities

3 True/False questions

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

          

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

          

  3. amoebocyteany of the flagellate cells that line the cavities

          

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