Q. Which of the following gymnospermic corolloid roots are associated with $N_{2}$-fixing cyanobacteria?
A) Pinus
B) Cycas
C) Cedrus
D) Ginkgo
Explanation
Corolloid root is developed in Cycas. It contain an algae zone in the cortex. This algal zone contains blue-green algae (cyanobacteria) like Nostoc, Anabaena, which grow in symbiotic association with corolloid root
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.