The primary role of oxygen in cellular respiration is to. A) yield energy in the form of ATP as it is passed down the respiratory chain. B) act as an acceptor for electrons and hydrogen, forming water. C) combine with carbon, forming COâ.
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environment noun (NATURE). âº earth science [U] the âair, âwater, and âland in or on which âpeople, âanimals, and âplants âlive: Weâre âtrying to âprotect the environment from âpollution.