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8.Microbes in Human Welfare
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A nitrogen fixing bacterium that forms a loose assocation with the roots of crop plants is
A
Azotobacter
B
Bacillus polymyxa
C
Clostridium
D
Azospirillum
Solution
(d)A bacterium Azospirillum lipoferum forms loose association with roots of maize and some Brazilian grasses which increase the crop yield upto a large extent.
Standard 12
Biology
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