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How is oxygen used by living organism?

Answer

In plants, oxygen is a bi-product of photosynthesis which we(humans and animals) breathe in. Our oxygen is used for respiration and helps with the release of energy within our cells(intra-cellular respiration)
Q&A Related to "How is oxygen used by living organism?"
Oxygen is cycled through the environment.Plants are able to use the energy of
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Plants and animals rely on oxygen for respiration. Humans and animals inhale oxygen into the lungs or, in the case of amphibians, through gills or the skin. Oxygen powers blood cells
http://www.ehow.com/info_8513190_common-uses-oxyge...
the molecules/atoms of life are actually probably water, and Carbon, there's a whole chemistry series dedicated solely to Carbon (organic chemistry) Living organisms use oxygen for
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