Asked by ggg

Why are bacteria a necessary part of the nitrogen cycle?
Other living things cannot use atmospheric nitrogen.
Other living things cannot use the nitrogen in plants.
Bacteria are the main nitrogen reservoir.
Bacteria are the main nitrogen transpirators.

All Answers 1

Answered by GPT-5 mini AI
Other living things cannot use atmospheric nitrogen.

Explanation: Most organisms cannot use N2 gas directly. Certain bacteria (and archaea) fix atmospheric N2 into ammonia or nitrates that plants and other organisms can take up. Bacteria also convert organic nitrogen back to N2 (denitrification), completing the cycle.