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8.Microbes in Human Welfare
medium
Which one is a nonsymbiotic nitrogen fixer
A
Rhizobium
B
Oscillatoria
C
Nostoc
D
Lactobacillus
Solution
(c)Nostoc is a free living nitrogen-fixing blue green algae probably with the help of heterocysts. Photosynthesis provides the energy for nitrogen fixation.
Standard 12
Biology