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4 Written Questions

3 Multiple Choice Questions

  1. Gas exchange and excretion occur via diffusion across individual cell membranes.
  2. no body cavity
  3. no true tissue

3 True/False Questions

  1. what do they lack?They lack tissues, organs, and organ system.


  2. What kind of feeding?intracellular


  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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