Question

which gas prevents nitrogen fixation?​

Answer 1

Answer:

Oxygen

Explanation:

Nitrogen fixing bacteria are found in anaerobic conditions. Carbon dioxide supports their growth. but in oxidizing conditions they start to perish, hence lowering the nitrogen fixation rate.

Actually nitrogen fixation is the process of converting nitrogen in the atmosphere aka air into ammonia and related nitrogenous products. It is mostly done in soil by microorganisms such as diazotrophs including Azotobacter and Archaea. They can also occur between termites and fungi. But mostly legume family plants are responsible for this. The legumes in the roots contain nitrogen which upon the dying of the plant is converted into manure and nitrogen rich substance for the soil fertility. Oxygen on other hand oxidizes the legumes which cannot survive in the aerobic condition. Hence it starts to perish in Oxygen rich environment and nitrogen fixation could not be done.

Answer 2

Answer:

Nitrogenases gas prevents nitrogen fixation. Biological nitrogen fixation or BNF can be formed during the atmospheric nitrogen process and atmopstheric nitrogen can be converted to ammonia by an enzyme. This enzyme is known as Nitrogenases. These are the enzymes which used by some organisms and they can fix the atmospheric nitrogen gas. Atmospheric nitrogen is abreacted by N2 and here Nitrogenases is the correct answer.