Question

Roots of Cycas has a specialized tap root 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. Coralloid roots lie near the soil surface. They are irregular and branched. Root hair and root cap are absent in these roots.