As animals have evolved large body size, they have also evolved adaptations to improve exchange of energy and materials with the environment. For example, in many larger organisms, evolution has favoured lungs and a digestive tract with ________.
A) more branching or folds
B) increased thickness
C) larger cells
D) decreased blood supply

Question

Quizplus · Accepted Answer

More branching or folds in the lungs and digestive tract increase surface area, allowing for more efficient exchange of energy and materials with the environment. Increased thickness, larger cells, and decreased blood supply would not necessarily improve exchange with the environment.

As Animals Have Evolved Large Body Size, They Have Also