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Byju's Answer
Standard XII
Biology
Microbes in Agriculture
Choose the co...
Question

Choose the correct answers from the alternatives given.
A free-living bacterium capable of fixing nitrogen is:

A
Rhizobium
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B
Streptococcus
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C
Pseudamonas
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D
Azotobacter
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Solution

The correct option is D Azotobacter
The free-living (nonsymbiotic) bacteria are the Cyanobacteria, Anabaena, Nostoc, Azotobacter are capable of nitrogen fixation.
So, the correct option is 'Azotobacter'.

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