Gujarati
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

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