Question

Which of the following statements correctly describe nitrogen and its role as a plant nutrient?

Answer 1

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.