What is the name of the process by which mineral ions enter the root hair cells?

The process by which mineral ions enter the root hair cells is called "Active Transport".

Here are the steps of this process:

1. Mineral ions in the soil are often in a lower concentration than inside the root hair cell.

2. For the ions to move from an area of lower concentration (soil) to an area of higher concentration (inside the root hair cell), energy is required.

3. This energy is provided by respiration in the form of ATP (Adenosine Triphosphate).

4. The ATP provides energy to carrier proteins present in the cell membrane.

5. These carrier proteins carry the mineral ions into the cell against the concentration gradient.

6. This is why it is called 'active' transport because it requires energy to carry out the process.

7. Once inside the cell, these mineral ions are used for various cellular processes.