The evolution of the lung was a critical development in the adaptation of animals to a terrestrial lifestyle; the first vertebrates to breathe using a lung were the reptiles.

Question

Quizplus · Accepted Answer

The first vertebrates to breathe using lungs were actually early fish, such as lungfish, not reptiles. Reptiles evolved later and inherited the ability to breathe air from these earlier lung-breathing ancestors.

The Evolution of the Lung Was a Critical Development in the Adaptation