Question

how much % nitrogen present in the atmosphere? name the bacteria help in nitrogen fixation. what is use of nitrogen for living things?​

Answer 1

Nitrogen is a component of proteins and nucleic acids and is essential to life on Earth. Although nitrogen is abundant in the atmosphere, most organisms cannot use it in that form. Nitrogen-fixing bacteria accomplish more than 90 percent of all nitrogen fixation and thus play an important role in the nitrogen cycle.

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Answer 2

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• Nitrogen fixation is a process in which nitrogen (N₂) in the atmosphere is converted into ammonia (NH₃).

• Examples :- Azotobacter, Bacillus, Clostridium, and Klebsiella.