Which one is not a nitrogen fixing bacteria ?
AAzotobacter
BAzospirillum
CFrankia
DClostridium
Answer:
D. Clostridium
Read Explanation:
Clostridium is not a nitrogen-fixing bacteria; while Azotobacter, Azospirillum, and Frankia are all known to fix nitrogen.
Azotobacter and Azospirillum: These are free-living bacteria that can fix nitrogen in the soil.
Frankia: This bacterium can also fix nitrogen, but it often forms symbiotic relationships with certain plants, like alder trees.
Clostridium: This bacterium is primarily known for its role in anaerobic fermentation and is not involved in nitrogen fixation.
Nitrogen fixation is the process of converting atmospheric nitrogen into a usable form for plants, and only certain bacteria have the ability to do this.