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Which of the following is not a free-living Nitrogen-fixing bacteria?(a) Azotobacter(b) Clostridium(c) Klebsiella(d) XanthomonasThis question was addressed to me in semester exam.The doubt is from Microbes as Biofertilizers in section Microbes in Human Welfare of Biology – Class 12

Answer»

The correct option is (d) XANTHOMONAS

The best EXPLANATION: Some of the free-living Nitrogen-fixing bacteria are-Azotobacter, Clostridium, Klebsiella and Beijerinckia. RHIZOBIUM, Xanthomonas and FRANKIA are some of the symbiotic Nitrogen-fixing bacteria.



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