Q. Which of the following belongs to free living nitrogen fixing bacteria? I. $Rhizobium$ II. $Azospirillum$ III. $Azotobacter$ Choose the correct option
A) I and II
B) I and III
C) II and III
D) I, II and III
Explanation
Azospirillum and Azotobacter are free living nitrogen fixing bacteria. Free living $N_{2}$-fixing bacteria fix atmospheric nitrogen in the soil and make it available for the higher plant
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.