4 Written questions
3 Multiple choice questions
- no true tissue
- They lack tissues, organs, and organ system.
- Gas exchange and excretion occur via diffusion across individual cell membranes.
3 True/False questions
what kind of digestion? → intracellular
What are choanocytes? → Specialized flagellated cells, choanocytes, move water through and filter food particles from the water
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.