Question

Azolla pinnata has been found to be an important bio-fertilizer for paddy crops. This quality is due to the presence of

• A. $N_{2}$- fixing bacteria
• B. Mycorrhizae
• C. $N_{2}$- fixing cyanobacteria
• D. All of these

Answer 1

Answer: (C)

$N_{2}$- fixing cyanobacteria