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4 Written questions

3 Multiple choice questions

  1. an independent and immature form of an organism that is morphologically different from the adult form
  2. within 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. any of the flagellate cells that line the cavities

3 True/False questions

  1. spiculean asexual reproductive structure produced by some freshwater sponges


  2. osculuman opening in a sponge's body through which water exits


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