Animal Characteristics and Evolution Quiz

Animals evolved to have a coelom for extracellular digestion.

Animals evolved a body cavity to increase food capacity and digestion. (correct)

Animals evolved to have a haploid gametophyte stage.

Animals evolved to have cell walls for active movement.

Invertebrates have a radial symmetry. (correct)

Invertebrates have a coelom for complex structures in the digestive system.

Invertebrates have distinct tissues and organs.

Invertebrates are sessile as adults.

Cnidarians have specialized cells but no distinct tissues or organs. (correct)

Cnidarians have a coelom for extracellular digestion.

Cnidarians exhibit bilateral symmetry.

Cnidarians release enzymes into the gut cavity for digestion.