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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. no true tissue
  3. They lack tissues, organs, and organ system.

3 True/False questions

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

          

  2. what kind of digestion?Sponges are sessile (sedentary), filter feeding animals

          

  3. • Type of body cavityno body cavity

          

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