Homogeneous mixtures have sharp melting and boiling points.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Statement**: The question states that "Homogeneous mixtures have sharp melting and boiling points." We need to analyze this statement to determine its validity.

2. **Definition of Homogeneous Mixtures**: A homogeneous mixture is a mixture that has a uniform composition throughout. This means that the different components are mixed evenly and cannot be easily distinguished from one another.

3. **Melting and Boiling Points**:
- **Pure Substances**: Pure substances have sharp melting and boiling points. This means they melt or boil at a specific temperature.
...