Q. Which of the following cyanobacteria can fix atmospheric nitrogen? I. $Volvox$ II. $Oscillatoria$ III. $Nostoc$ IV. $Anabaena$ Choose the correct option

A) I, II and III
B) I, II and IV
C) II, III and IV
D) III and IV
Explanation

Cyanobacteria fix atmospheric nitrogen and increase the organic matter of the soil through photosynthetic activity$,\ e.g.,$Nostoc, Anabaena, Oscillatoria, etc.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.