The uptake of minerall ions against concentration is called ………….

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process involved in the uptake of mineral ions against their concentration gradient. This means that the ions are being moved from an area of lower concentration to an area of higher concentration.

2. **Defining Concentration Gradient**: A concentration gradient exists when there is a difference in the concentration of a substance across a space. In this case, it refers to the difference in concentration of mineral ions inside the plant cells compared to the surrounding soil or water.

3. **Identifying the Type of Transport**: The movement of substances can occur in two main ways: passive transport and active transport. Passive transport does not require energy and occurs along the concentration gradient (from high to low concentration). In contrast, active transport requires energy to move substances against the concentration gradient (from low to high concentration).

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