Which Statement Concerning Nitrifiers, Which Act in Soil and Seawater

Multiple Choice

Which statement concerning nitrifiers, which act in soil and seawater, is false?

A) They include prokaryotes that convert ammonia (NH₃) to nitrite (NO₂^) .
B) They include prokaryotes that convert nitrite (NO₂^) to nitrate (NO₃^) .
C) Nitrate is the form of nitrogen most easily used by plants.
D) These bacteria include Nitrosococcus and Nitrobacter.
E) These bacteria commonly occur on human skin.