Q. Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism?
A) Crotalaria juncea
B) Cycas revoluta
C) Cicer arietinum
D) Casuarina equisetifolia
Explanation
[Solution from source] Casuarina, a flowering plant, bears root nodules containing Frankia, a filamentous actinomycete that fixes nitrogen. Crotalaria and Cicer are legumes whose nodules contain the rod-shaped bacterium Rhizobium, and Cycas is a gymnosperm whose coralloid roots have cyanobacteria. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.