Question

Azolla is used as a biofertilizer because it

• A. multiplies very fast to produce massive biomass
• B. has association of nitrogen ‐ fixing Rhizobium
• C. has association of nitrogen ‐ fixing cyanobacteria
• D. has association of mycorrhiza

Answer 1

Answer: (C)

Azolla is a pteridophyte and used as a biofertilizer because it has association with nitrogenfixing cyanobacteria Anabaena azollae.