Answer :
E) N2 contains a strong triple bond that makes it unable to react within organisms.
In the atmosphere, nitrogen exists as a gas (N2), but in the soils it exists as nitrogen oxide, NO, and nitrogen dioxide, NO2, and when used as a fertilizer, can be found in other forms, such as ammonia, NH3, which can be processed even further into a different fertilizer, ammonium nitrate, or NH4NO3.Nitrogen gas from the atmosphere is fixed into organic nitrogen by nitrogen-fixing bacteria. This organic nitrogen enters terrestrial food webs. It leaves the food webs as nitrogenous wastes in the soil.Atmospheric nitrogen fixation is the process where the molecular N2 from the air is converted into useful nitrogenic compounds such as NH3 (ammonia) for other biological processes. The process is performed by various nitrogen-fixing bacteria such as Azotobacter, Bacillus, Clostridium, and Klebsiell.One form of nitrogen gas, nitrous oxide, is also a potent greenhouse gas and can contribute to global warming. High levels of nitrous oxide in the atmosphere also degrade the atmospheric ozone layer, and nitric oxide can create dangerous ground-level ozone.
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