Energy Flow Through Ecosystems

AP Biology· difficulty 3/5

The arrow from NH4+ to NO3- is performed by which group of organisms?

A
$Denitrifying bacteria$
B
$Decomposing fungi$
C
$Nitrifying bacteria (Nitrosomonas, Nitrobacter)$
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D
$Mycorrhizal fungi$

Explanation

Nitrification is a two-step oxidation NH4+ -> NO2- -> NO3-, performed by chemoautotrophic bacteria such as Nitrosomonas and Nitrobacter.

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