A free-living nitrogen-fixer is

Assertion: Reduction of nitrogen to ammonia by living organisms is called nitrification. Reason: Example of free-living nitrogen fixing anaerobic microbes are Azotobacter and Bijerinckia.

Which of the following is a free living nitrogen fixing bacteria ?

Which one of the following is free living nitrogen fixing cyanobacterium ?

Match column I with column II and select the correct answer from the gives codes. {:(Column I,Column II),(A."Trichoderma",(i)"Free living nitrogen fixing bacteria"),(B."Streptomyces",(ii)"Biocontrol agent"),(C."Azospirillum",(iii)"Lactic acid"),(D."Lactobacillus",(iv)"Source of antibiotic"):}

Correct the statements : Azotobacter is a symbiotic living nitrogen fixer.

Nitrogen fixation is

Which one of the following is a free-living obligate anaerobic bacterium?