Which characteristic(s)is (are)shared by both cnidarians and flatworms?
A) dorsoventrally flattened bodies
B) true muscle
C) radial symmetry
D) a digestive system with a single opening
E) two of these

Question

Quizplus · Accepted Answer

Both cnidarians and flatworms have a digestive system with a single opening (known as a gastrovascular cavity in cnidarians and a gastrodermis in flatworms). They do not have a separate mouth and anus.

Which Characteristic(s)is (Are)shared by Both Cnidarians and Flatworms