Botany - Mineral Nutrition Question with Solution | TestHub

Very few living organisms can utilise the nitrogen in the form N₂, available abundantly in the air. Only certain prokaryotic species are capable of fixing nitrogen. Reduction of nitrogen to ammonia by living organisms is called biological nitrogen fixation. The enzyme, nitrogenase which is capable of nitrogen reduction, is present exclusively in prokaryotes. Such microbes are called N₂- fixers.