Asked by Vaggi
The three steps of the nitrogen cycle in order, starting with nitrogen gas in the atmosphere, are (1 point)
O nitrogen fixation, nitrification, and denitrification.
O nitrification, nitrogen fixation, and denitrification.
O denitrification, nitrification, and nitrogen fixation.
O nitrogen fixation, denitrification, and nitrification.
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Answer: nitrogen fixation, nitrification, and denitrification.
Explanation: Atmospheric N2 is first fixed into ammonia (nitrogen fixation), ammonia is oxidized to nitrite/nitrate (nitrification), and nitrates are reduced back to N2 (denitrification).
Explanation: Atmospheric N2 is first fixed into ammonia (nitrogen fixation), ammonia is oxidized to nitrite/nitrate (nitrification), and nitrates are reduced back to N2 (denitrification).
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