Evolutionary adaptations that help diverse animals exchange matter with the environment include
a. gastrovascular activity, two-layered body, and torpedo shape.
b. large volume, long tubular body, and wings.
c. complex internal structures, small size, and large surface area.
d. external respiratory surface, small size, and two-layered body.
e. unbranched internal surface, small size, and thick covering.
1 answer
Definitely D.