Question

why does absorption of minerals by root hairs need carrier proteins

Answer 1

Answer:

They cannot be absorbed by diffusion , because the minerals are in very low concentration. Instead, active transport is used. The root hair cells have carrier proteins in their cell membranes. ... Because active transport moves ions against the concentration gradient into the root hair cells, energy is needed.

Answer 2

Answer:

The root hair cells have carrier proteins in their cell membranes. These pick up the mineral ions and move them across the membrane into the cell against the concentration gradient  because active transport moves ions against the concentration gradient into the root hair cells, energy is needed.

It may be because the ion which is to be transported may be nonpolar , hydrophobic ( water repelling ) so they cannot trasport across by themselves since root hair contains water

hope it help u