The atmosphere is composed of 78% nitrogen gas. However, this nitrogen is not useful to most life until it is converted into ______, through the action of soil-dwelling bacteria.

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    NH3
    N
    NO3-
    N2
asked May 19, 2013 in Biology by anonymous
    

1 Answer

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NO3-
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)

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