Which of the following vertebrates does the skin function as a respiratory surface?
Answer Details
Among the given options, the vertebrate whose skin functions as a respiratory surface is the frog. Frogs are amphibians, and they have a moist and permeable skin that allows for the exchange of gases such as oxygen and carbon dioxide. Oxygen is absorbed into the bloodstream through the skin, while carbon dioxide is released out of the body through the same skin. This is possible because their skin is thin and moist, making it an ideal respiratory surface for the frog.