Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria

  • A

    $N_{2}$-fixer microbes

  • B

    Prokaryotic organism

  • C

    Both $(a)$ and $(b)$

  • D

    Eukaryotic organism

Similar Questions

Azotobacter and Bacillus polymyxa are

  • [AIPMT 1996]

Which of the following is not a symbiotic nitrogen fixing bacterium?

Symbiotic nitrogen fixation in root nodules of some legumes is caused by

Farmers have reported $50\%$  higher yield of rice by using biofertilizer

  • [AIPMT 1998]

Agricultural chemicals include