When any dry plant material or seeds are kept in water, they swell up.
Q (c) Give two conditions essential for the phenomenon to occur.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Phenomenon**: The swelling of dry plant material or seeds when placed in water is a process known as imbibition. This is a specific type of diffusion where water is absorbed by solids or colloids, leading to an increase in their volume.

2. **Definition of Imbibition**: Imbibition can be defined as the absorption of water by dry materials, which causes them to swell. This process is crucial for seeds and dry plant materials to initiate germination and growth.

3. **Identifying Essential Conditions**: To understand the conditions necessary for imbibition to occur, we need to identify the two key factors:

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