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

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 8. microbes in human welfare1 Mark
MCQ
Azolla is used as a biofertiliser because it
  • A
    Has association of mycorrhiza
  • B
    Multiplies at faster rate to produce massive biomass
  • C
    Has association of nitrogen-fixing Rhizobium
  • ✓
    Has association of nitrogen-fixing cyanobacteria
✓

Answer

Correct option: D.
Has association of nitrogen-fixing cyanobacteria
d
Azolla is a pteridophyte and it is used as a biofertiliser because it has association with nitrogen-fixing cyanobacteria called Anabaena azollae.

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