Question

The bulk of nitrogen in nature is fixed by?

• A. Lighting
• B. Chemical industries
• C. Denitrifying bacteria
• D. Symbiotic bacteria

Answer 1

The correct option is D Symbiotic bacteria

Two kinds of microbes carry out nitrogen: non- symbiotic microscopic organisms in the dirt and symbiotic microorganisms that live in the underlying foundations of plants. Microscopic organisms in the genera Clostridium and Azotobacter are non-cooperative nitrogen-settling microorganisms, while those in the sort Rhizobium are advantageous microbes.

So, the correct option is 'Symbiotic bacteria'.