One advantage of gas exchange in water is that

Question

Quizplus · Accepted Answer

Gas exchange surfaces in water can easily stay wet, which helps to maintain the diffusion gradient for gas exchange. In contrast, gas exchange surfaces in air can dry out, making gas exchange more difficult. Additionally, the oxygen content in water may be lower than in air, and eliminating carbon dioxide may actually be more difficult in water than in air. While ventilating gills in water may require less energy than ventilating lungs in air, this is not necessarily an advantage of gas exchange in water as a whole.

One Advantage of Gas Exchange in Water Is That