Question

xii) How do nitrogen-fixing bacteria contribute to the nitrogen cycle? A) return nitrogen to atmosphere
(B) change ammonium to nitrate (C) change N2 to ammonium (D) absorb nitrate from the soil​

Answer 1

Answer:

Bacteria are able to convert ammonia to nitrite and nitrate but they are inhibited by light so this must occur below the euphotic zone. Ammonification or Mineralization is performed by bacteria to convert organic nitrogen to ammonia. Nitrification can then occur to convert the ammonium to nitrite and nitrate.