Nitrogen Cycle
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ENVIRONMENTAL SCIENCE
Biogeochemical Cycles
Nitrogen Cycle
Nitrogen's invisible tug-of-war shapes ecosystems and fuels environmental crises
14 days ago
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What is the main reason atmospheric nitrogen (N2) is not directly usable by most organisms, necessitating the nitrogen cycle's fixation process?
Because the triple bond in N2 molecules makes it chemically inert and biologically unavailable.
Because atmospheric nitrogen is too scarce to meet biological needs.
Because nitrogen in the atmosphere is already in a form plants can absorb directly.
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