Symbiotic nitrogen fixation in root nodules of some leguminous plants is caused by
A. Rhizobium
B. Azotobacter
C. Nitrobacter
D. Nitrosomonas
Answer:A
Symbiotic nitrogen fixation in root nodules of some leguminous plants is caused by
A. Rhizobium B. Azotobacter C. Nitrobacter D. Nitrosomonas