Some plants have nitrogen-fixing bacteria in their root nodules. What are these bacteria called?
A. Blue green algae
B. Nitrosomonas
C. Azotobacter
D. Rhizobium
Answer:D
Some plants have nitrogen-fixing bacteria in their root nodules. What are these bacteria called?
A. Blue green algae B. Nitrosomonas C. Azotobacter D. Rhizobium