Why do some water masses in subsurface oceans have little or no oxygen?
A)Rates of photosynthesis are low in overlying waters, limiting the availability of oxygen.
B)Rates of photosynthesis are high in overlying waters, supporting high rates of respiration in waters that deplete the oxygen there.
C)Waters underneath the surface oceans are cold and so have a limited capacity to carry oxygen in solution.
D)Large carnivores deplete oxygen in subsurface oceans via their high rates of oxygen metabolism.

Question

Quizplus · Accepted Answer

When rates of photosynthesis are high in overlying waters, they support high rates of respiration in waters that deplete the oxygen there. This can lead to some water masses in subsurface oceans having little or no oxygen.

Why Do Some Water Masses in Subsurface Oceans Have Little