Which statement best describes the difference between a gastrovascular cavity and an alimentary canal?
A) Gastrovascular cavities are longer than alimentary canals.
B) Gastrovascular cavities have one opening and alimentary canals have two.
C) Gastrovascular cavities have two openings and alimentary canals have one.
D) Organisms with gastrovascular cavities can ingest food while earlier meals are still being digested, but organisms with an alimentary canal must completely digest and eliminate one meal before consuming another.
