What is endosmosis and exosmosis?

Explanation

### Step-by-Step Solution:

1. **Definition of Endosmosis**:
- Endosmosis refers to the process where water molecules move into a cell through a semi-permeable membrane. This movement occurs when the surrounding solution (the external environment) is less concentrated than the solution inside the cell.
- As a result of this inward diffusion of water, the cell takes in water and swells up.

2. **Conditions for Endosmosis**:
- The key condition for endosmosis to occur is that the external solution must be hypotonic (less concentrated) compared to the internal cellular solution. This creates a concentration gradient that drives water into the cell.
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