Given a scientific question, generate a correct answer to it.

[Q]: Oxygenated air, taken in during inhalation, diffuses across the surface of the lungs into the what?
[A]: bloodstream

[Q]: What makes monotremes different than other mammals?
[A]: they lay eggs

[Q]: The benthic zone is found at the bottom of all of what type of biomes?
[A]:
aquatic