Your question makes no sense. Only human children can be "adopted", root hairs cannot be adopted. Further, root hairs are plural so it should be "their function" not "its function".
The function of root hairs is to absorb water and nutrients from the soil. If the root hairs have a cuticle covering, it will prevent the free absorption of water and nutrients from the soil.
no tap roots are not the same as root hairs, root hairs are more of fibrous roots, on a plant there can only be one major tap root yet there can be many root hairs.
Root Hairs
Pretty self explanatory, root hairs are hairs on roots. Root hairs are basically tiny projections on the root which can grow through the spaces between soil particles, and they add a great amount of surface area to the roots. result: more water intake.
Root hairs grow longer as they age (similar to how we grow taller as we age). Since the older (and therefore longer) root hairs are at the distal end of the root cap (towards the base of the root), it creates a tapering appearance. In other words, as you move from the base of the root towards the root cap, the root hairs become shorter since they are younger.
the function known as elongation
The function of root hairs is to absorb water and nutrients from the soil. If the root hairs have a cuticle covering, it will prevent the free absorption of water and nutrients from the soil.
Chloroplasts need sunlight for function. Root hairs do not get sun light
allows the exit of hairs through the epidermal surface
Generally root hairs are not the ones who absorb water,it is still a function of a root.
Root hairs - Absorptive unicellular extensions of epidermal cells of a root. These tiny, hair-like structures function as the major site of water and mineral uptake. Root hairs are extremely delicate and subject to desiccation. Root hairs are easily destroyed in transplanting.
the root hairs are located in the region above the root tip.
one thousand root hairs are in a tree
no tap roots are not the same as root hairs, root hairs are more of fibrous roots, on a plant there can only be one major tap root yet there can be many root hairs.
is epidrmis present in root hairs
Root Hairs
The special structural character that the root epidermis possess is the root hairs which enables it perform its functions effectively.