Cut pieces of beetroot do not leave the colour in cold water but do so in hot water. Explain.

Explanation

### Step-by-Step Solution:

1. **Understanding the Composition of Beetroot**: Beetroot contains a pigment called betalain, which is responsible for its deep red color. This pigment is located within the vacuoles of the beetroot cells.

2. **Effect of Temperature on Cell Membranes**: The plasma membrane of plant cells, including beetroot, is composed of a lipid bilayer that is sensitive to temperature changes. At lower temperatures (like in cold water), the membrane remains intact and functions properly, preventing the pigment from leaking out.

3. **Diffusion Process**: Diffusion is the movement of substances from an area of higher concentration to an area of lower concentration. In the case of beetroot in hot water, the concentration of the pigment inside the cells is higher than that in the surrounding water.

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