Which of the following statements about the value of the nitrogen cycle to an ecosystem is NOT true?
A. Nitrification occurs as ammonium is converted to nitrate.
B. Nitrogen fixation can occur in aquatic systems or in soil bacteria.
C. Both ammonium and nitrate ions are highly water-soluble
D. Nitrification occurs as nitrogen gas is converted to nitrate.
E. Denitrification removes nitrogen from the atmosphere and converts it to a form that plants can use.
Answer: E
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