Question

The process of conversion of nitrogen to ammonia by the microbes is described as

• A. nitrification
• B. denitrification
• C. nitrogen-fixation
• D. Habers process

Answer 1

Answer: (C)

nitrogen-fixation

Answer 2

Plants compete with microbes for the limited nitrogen that is available in soil. The process of conversion of nitrogen $(N_{2})$ to ammonia is termed as nitrogen-fixation. Only certain prokaryotic species are capable of fixing nitrogen. The enzyme nitrogenase which is capable of nitrogen reduction is present in prokaryotes.