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STD 12 - 8. microbes in human welfare — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 8. microbes in human welfare1 Mark
MCQ
Which one is a nonsymbiotic nitrogen fixer
  • A
    Rhizobium
  • B
    Oscillatoria
  • ✓
    Nostoc
  • D
    Lactobacillus
✓

Answer

Correct option: C.
Nostoc
c
(c)Nostoc is a free living nitrogen-fixing blue green algae probably with the help of heterocysts. Photosynthesis provides the energy for nitrogen fixation.

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