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4 Written questions

3 Multiple choice questions

  1. In simple sponges, water enter the body through pores in the walls called ostia and passes into the spongocoel, a central space lined with choanocytes where food particles are trapped and digested intracellulary. Nutrients are passed to neighboring cells. Water leaves through a hole at the top of the sponge called the osculum. In more complex body plans, there is no spongocoel but several smaller chambers lined with choanocytes
  2. Sponges are sessile (sedentary), filter feeding animals
  3. They lack tissues, organs, and organ system.

3 True/False questions

  1. where does gas exchange occur?In simple sponges, water enter the body through pores in the walls called ostia and passes into the spongocoel, a central space lined with choanocytes where food particles are trapped and digested intracellulary. Nutrients are passed to neighboring cells. Water leaves through a hole at the top of the sponge called the osculum. In more complex body plans, there is no spongocoel but several smaller chambers lined with choanocytes

          

  2. what kind of digestion?intracellular

          

  3. What is the sponge body comprised of?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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