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Biology 18 Online
OpenStudy (anonymous):

The organisms that produced the oxygen gas in Earth's atmosphere paved the way for the type of metabolism used by larger organisms, called a. endosymbiotic b. aerobic c. photosynthetic d. anaerobic e. heterotrophic

OpenStudy (anonymous):

Hetrotrophic

OpenStudy (anonymous):

No, aerobic lol http://en.wikipedia.org/wiki/Aerobic_organism

OpenStudy (aaronq):

aerobic = uses oxygen for metabolic processes

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