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4 Written questions

3 Multiple choice questions

  1. no true tissue
  2. They lack tissues, organs, and organ system.
  3. Gas exchange and excretion occur via diffusion across individual cell membranes.

3 True/False questions

  1. what kind of digestion?intracellular


  2. What are choanocytes?Specialized flagellated cells, choanocytes, move water through and filter food particles from the water


  3. How do the sponges have structure and strength?The sponge body is comprised of a couple different cell types that form the outside and inside layers of the body wall.


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