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NEET Biology QUESTION #7260
Question 1
Which of the following is a flowering plant with root nodules containing filamentous nitrogen-fixing microorganisms?
  • <em>Cicer arietinum</em>
  • <em>Casuarina equisetifolia</em>✔️
  • <em>Crotalaria juncea</em>
  • <em>Cycas revoluta</em>
Correct Answer Explanation
Casuarina equisetifolia (a flowering plant/angiosperm) forms root nodules with Frankia, a filamentous actinomycete (not a typical rod-shaped bacterium). Cicer and Crotalaria form nodules with Rhizobium (non-filamentous). Cycas is a gymnosperm with coralloid roots harbouring cyanobacteria.