Question

Which of the following is a reason for large surface area of roots?

• A. Root hairs have thin walls.
• B. Root hairs are $2$ layered structures.
• C. Presence of enormous root hairs.
• D. All of the above.
  

Answer 1

The correct option is C Presence of enormous root hairs.

The total surface area of the roots which comes in contact with subsoil water is enormous. This is because many rootlets arise from even a growing seedling. Each rootlet further has thousands of root hairs. This structure of root is to provide large surface area for the absorption of moisture from the soil.