Question
What is free nitrogen?
nitrogen that is ready for plants to use
nitrogen that has been fixed by bacteria
nitrogen that cannot be used by organisms
nitrogen that is returned to the soil by decomposers
nitrogen that is ready for plants to use
nitrogen that has been fixed by bacteria
nitrogen that cannot be used by organisms
nitrogen that is returned to the soil by decomposers
Answers
GPT-4o mini
Free nitrogen refers to atmospheric nitrogen (N₂) that is abundant in the Earth's atmosphere but is in a form that plants and most organisms cannot use directly. Therefore, the correct answer is:
**nitrogen that cannot be used by organisms**
For plants to utilize nitrogen, it must be fixed into forms such as ammonium (NH₄⁺) or nitrate (NO₃⁻), which is achieved by certain bacteria and processes in the nitrogen cycle.
**nitrogen that cannot be used by organisms**
For plants to utilize nitrogen, it must be fixed into forms such as ammonium (NH₄⁺) or nitrate (NO₃⁻), which is achieved by certain bacteria and processes in the nitrogen cycle.