Which of the following organisms can fix nitrogen ?

Which of the following organisms can increase nitrogen content of the soil?

Which of the following organisms can increase nitrogen content of the soil?

Which of the following organisms can fix atmospheric nitrogen as free living organisms as well as symbionts?

Which of the following is symbiotic nitrogen fixes ltbr. Or Which of the following can fix nitrogen in non-legu,inous plants

Which one of the following can fix nitrogen ?

Which of the following enzymes fixes nitrogen?

Which of the following enzymes fixes nitrogen?