Particles and waves i think.
The answer is D, the liver.
Answer: A) The 'lub' sound is caused as the atrioventricular valves close.
Explanation:
USATestprep just answered it
Water
The electrons stripped from glucose first end up forming oxygen as cellular respiration proceeds with the electron transport chain (step). Eventually, the oxygen is combined with the hydrogen ions initially released or split from glucose by the dehydrogenase enzyme. The reaction between oxygen and hydrogen ends up forming water.
