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4 Written questions

3 Multiple choice questions

  1. a needle of silica or calcuim carbonate in the skeleton of some sponges
  2. one of the small openings in a sponge's body through which water enters
  3. the outer surface layer of cells of a plant or animal

3 True/False questions

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

          

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

          

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