Question

Which of these is true about the nitrogen cycle?

A. No living organisms except bacteria and algae play a role in the entire nitrogen cycle.

B. Only bacteria fix nitrogen in the soil by converting atmospheric nitrogen into nitrogenous compounds.

C. Plants do not utilize atmospheric nitrogen directly and depend on nitrogenous compounds in the soil or other sources.

D. Atmospheric nitrogen that gets converted into nitrogenous compounds and fixed into the soil cannot return to the atmosphere.​

Answer 1

a). no living organisms except bacteria and algae play a role in the entire nitrogen cycle

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Answer 2

Answer:

Atmospheric nitrogen that gets converted into nitrogenous compounds and fixed into the soil cannot return to the atmosphere

Explanation:

D is the correct option

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