$A$ nitrogen-fixing bacterium that forms a loose association with the roots of crop plants is

  • A
    Azotobacter
  • B
    Bacillus polymyxa
  • C
    Clostridium
  • D
    Azospirillum

Explore More

Similar Questions

For nitrogen fixation,the useful pigment is

Which mineral element plays an essential role in nitrogen fixation?

Which bacteria fix atmospheric nitrogen while they are free-living in the soil?

Which cofactor is essential for the activity of the nitrogenase enzyme?

$Nif$ genes occur in

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo