Which of the Following Does Not Contain a Gastrovascular Cavity

Question

Which of the following does not contain a gastrovascular cavity?
A) Hydras
B) Cnidarians
C) Sponges
D) Flatworms
E) Jellyfish

Accepted Answer

Sponges do not have a gastrovascular cavity; instead, they have a system of pores and channels through which water circulates for feeding, respiration, and waste removal.