Which process in the nutrient cycle converts atmospheric nitrogen into a form that plants can utilize?
B. Nitrogen fixation
Correct Option: Answer is B
Nitrogen fixation is the process in the nutrient cycle that converts atmospheric nitrogen (N2) into a form that plants can utilize, typically ammonium (NH4+) or nitrate (NO3-). This process is carried out by nitrogen-fixing bacteria, which can either be free-living in the soil or form mutualistic relationships with certain plants, such as legumes.