Question

Leaf epidermis and stem epidermis are both covered by a waxy cuticle, but root epidermis is not. How does the lack of a cuticle reflect the function of the root?

Answer 1

Roots are built to absorb more and are placed right in their environment that they will be absorbing nutrients. Unlike leaves and stems, roots are not exposed to the daily elements in the outdoors and therefore don’t need the protection and filter that the waxy cuticle provides.

I believe this is the difference..
I hope this helps! :)