What % of the atmosphere is nitrogen? A) do I have to answer? B) 0 % C) 27.56 % D) 75 % E) 79 %
a) The placing of leeches on people in the name of medical experimentation b) When bacteria convert nitrogen from one form to another c) When nitrates run into groundwater d) It’s a synonym for nitrogen fixation
A) a word that I can’t pronounce B) when heterotrophic bacteria break NO3- into N2 or N2O C) when ammonium is used in small amounts by plants D) when plants modify NH3 to NH4
a) N1 and N2 b) NH4 and NO3- c) Liquid and gaseous d) I have no clue
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