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4 Written questions

3 Multiple choice questions

  1. Gas exchange and excretion occur via diffusion across individual cell membranes.
  2. The sponge body is comprised of a couple different cell types that form the outside and inside layers of the body wall.
  3. Sponges are sessile (sedentary), filter feeding animals

3 True/False questions

  1. 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.

          

  2. what kind of digestion?intracellular

          

  3. • Number of tissueno body cavity