Question

Name two nitrogen-fixing microorganisms.

Hint:

Nitrogen-fixing bacteria are vital for the ecosystem as they enrich the soil with nitrogen, reducing the need for chemical fertilizers.

Answer 1

Step 1: Understand nitrogen fixation.
Nitrogen fixation is the process of converting nitrogen gas (N\(_2\)) from the atmosphere into a form (ammonia, NH\(_3\)) that plants can use for growth. This process is carried out by certain microorganisms.
Step 2: Nitrogen-fixing microorganisms.
Two nitrogen-fixing microorganisms are: - Rhizobium: These bacteria form a symbiotic relationship with leguminous plants and fix nitrogen in the roots of these plants. - Azotobacter: A free-living bacterium that fixes nitrogen in soil independently.
Final Answer: \[ \boxed{\text{Rhizobium, Azotobacter}} \]