Question

cnidaria - shape of life
what two body parts did cnidarians evolve that revolutionized digestion?
eyes and tentacles
heart and liver
brain and lungs
mouth and stomach

Explanation:

Cnidarians have a simple body plan. The mouth is the opening for taking in food, and they have a gastrovascular cavity (a simple stomach - like structure) where digestion occurs. Eyes and tentacles are more related to sensing and capturing prey rather than digestion. Cnidarians do not have a heart, liver, brain, or lungs as they are simple invertebrates.

Answer:

Mouth and stomach.