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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
Aquatic fern which is an excellent biofertilizer
  • A
    Salvinia
  • ✓
    Azolla
  • C
    Marsilea
  • D
    Pteridium
✓

Answer

Correct option: B.
Azolla
b
(b)Azolla pinnata $(aquatic fern)$  is a symbiotic nitrogen fixing cyanobacteria which is inoculated in rice fields in south-eastern Asia, and found to increase yield upto $50\%.$

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