Each time we take a breath,we are bringing in the oxygen we need to stay alive.The ultimate source of the oxygen used by all aerobic organisms comes from a reaction that
A) degrades carbon dioxide.
B) hydrolyzes ATP.
C) splits water.
D) reduces NADPH.

Question

Quizplus · Accepted Answer

The ultimate source of the oxygen used by all aerobic organisms comes from the splitting of water during the process of photosynthesis. The oxygen released in photosynthesis is used by aerobic organisms for respiration. Therefore, choice C, which states "splits water", is the correct answer. Choices A, B, and D do not accurately describe the ultimate source of oxygen used by aerobic organisms.

Each Time We Take a Breath,we Are Bringing in the Oxygen