Question

Roots of Cycas are specialised with extensive branching, called coralloid roots, which help in:

• A. Fixation of $C{O}_2$
• B. Fixation and absorption of nitrogen
• C. Respiration
• D. Absorption of minerals

Answer 1

The correct option is B Fixation and absorption of nitrogen

In Cycas specialised roots called coralloid roots are associated with $N_2$ - fixing cyanobacteria, either Nostoc or Anabaena prominently identified. Coralloid roots lie near the soil surface. They are irregular and branched. Root hair and root cap are absent in these roots.