Which of the following is an example of imbibition?

Options

A. Uptake of water by root hair
B. Exchange of gases in stomata
C. Swelling of seed when put in soil
D. Opening of stomata

Explanation

**Step-by-Step Solution:**

1. **Understanding Imbibition**: Imbibition is defined as the passive movement of water molecules from an area of higher concentration to an area of lower concentration. This process occurs without the expenditure of energy.

2. **Identifying Examples**: To determine which option is an example of imbibition, we need to analyze the provided choices:
- **Option 1**: Uptake of water by the root - This process involves diffusion and is not classified as imbibition.
- **Option 2**: Exchange of gases in the stomata - This process also occurs through diffusion and does not involve imbibition.
- **Option 3**: Swelling of the seed when placed in soil - This is a classic example of imbibition. When seeds are placed in water or moist soil, they absorb water and swell due to imbibition.
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