Question

Assertion:Cyanobacteria can fix atmospheric nitrogen
Reason: blue green algae add organic matter to the soil​

Answer 1

Answer:

Cyanobacteria are also called as Blue-green algae. They are photosynthetic bacteria. Cyanobacteria like Nostoc, Anabaena, Frankia, etc can do nitrogen fixation. Heterocysts are specialized nitrogen-fixing cells formed by some filamentous cyanobacteria, such as Nostoc. They contain enzyme nitrogenase. They create microanaerobic environment.

Thus, the correct answer is 'Assertion is correct but Reason is incorrect.'