most organisms use O2 in aerobic respiration to produce ATP. Almost all animals, most fungi, and some bacteria are obligate aerobes, which require oxygen. Some plants and fungi and many bacteria retain the ability to make ATP without oxygen.
Answer:
A
It produces molecules of ATP(Adenosine triphosphate)
It tends to happen in capillaries
for example in the lungs avioli are coverd in capilarries so to facilitate the diffusion (exchange) of oxygen in to the blood stream and carbon dioxide out of the blood stream
1) the same as.
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