Which of the following statements correctly describe nitrogen and its role as a plant nutrient?
-nitrogen is a macronutrient in plants.
-nitrogen-fixing bacteria in the soil convert n2 to nh3.
-nitrogen is a component of nucleic acids, proteins, hormones, and coenzymes.
-plant roots can only absorb nitrogen in the form of ammonium ions (nh4+) or nitrate ions (no3−).
-nitrogen deficiency usually causes plant leaves to turn yellow.

Answer;Nitrogen is a macronutrient in plants. Nitrogen-fixing bacteria in the soil convert N2 to NH3.  Nitrogen is a component of nucleic acids, proteins, hormones, and coenzymes.Plant roots can only absorb nitrogen in the form of ammonium ions (NH4+) or nitrate ions (NO3-)Explanation;Macronutrients are elements that are taken in large amounts by the plants, they include;  nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.Nitrogen-fixing bacteria in the soil and within the root nodules of some plants convert nitrogen gas in the atmosphere to ammonia.Plants absorb nitrogen from the soil both in the form of nitrate (NO3−) and ammonium (NH4+).Nitrogen is an essential element to form amino acids, proteins, nucleic acids, coenzymes and chlorophyll.