Which of the following
statements about the nitrogen cycle is false?
a. Ammonification converts organic
nitrogenous matter from living
organisms into ammonium (NH4
+
).
b. Denitrification by bacteria converts
nitrates (NO3
−
) to nitrogen gas (N2).
c. Nitrification by bacteria converts
nitrates (NO3
−
) to nitrites (NO2
−
).
d. Nitrogen fixing bacteria convert
nitrogen gas (N2) into organic
compounds.
