Nitrogen fixation in root nodules of Alnus is brought about by
A. Frankia
B. Azorhizobium
C. Bradyrhizobium
D. Clostridium
Answer:A
Nitrogen fixation in root nodules of Alnus is brought about by
A. Frankia B. Azorhizobium C. Bradyrhizobium D. Clostridium