What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates
a. have a body cavity, whereas pseudocoelomates have a solid body.
b. contain tissues derived from mesoderm, whereas pseudocoelomates have no such tissue.
c. have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not.
d. have a complete digestive system with mouth and anus, whereas pseudocoelomates have a digestive tract with only one opening.
Answer: c. have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not.