The nitrogen cycle is one of the most important and complex of the biogeochemical cycles. It is important because nitrogen is an essential part of biological molecules such as proteins and nucleic acids (DNA). Question: In this cycle.nitrogen fixation is: preplanned setting of atmospheric levels of nitrogen at 78% the reduction of nitrate (NO_(3)^-) to gaseous nitrogen. De conversion of gaseous nitrogen (N_(2)) into an organism friendly form. stabilizing elemental nitrogen into a gaseous two-atom molecule (N_(2))

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The nitrogen cycle is one of the most important and complex of the biogeochemical cycles. It is important because nitrogen is an essential part of biological molecules such as proteins and nucleic acids (DNA). Question: In this cycle.nitrogen fixation is: preplanned setting of atmospheric levels of nitrogen at 78% the reduction of nitrate (NO_(3)^-) to gaseous nitrogen. De conversion of gaseous nitrogen (N_(2)) into an organism friendly form. stabilizing elemental nitrogen into a gaseous two-atom molecule (N_(2))

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In the nitrogen cycle, nitrogen fixation is the conversion of gaseous nitrogen \((N_2)\) into an organism-friendly form. This process makes atmospheric nitrogen available to living organisms by converting it into compounds such as ammonia \((NH_3)\), which can be taken up and used by plants. Therefore, the correct answer is:- The conversion of gaseous nitrogen \((N_2)\) into an organism-friendly form.

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