Question

Which of these cannot act as a biofertiliser?

• A. Brown and Red Algae
• B. Blue-green algae
• C. Glomus
• D. Rhizobium

Answer 1

The correct option is A Brown and Red Algae

Biofertilisers are microorganisms which can fix nitrogen and hence enrich the soil with utilizable nitrogen-containing compounds. Blue-green algae or Cyanobacteria, Glomus (a genus of fungi) and Rhizobium can fix nitrogen, but brown and red algae cannot.