Ulothrix and Spirogyra are types of fungi.

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: The question mentions Ulothrix and Spirogyra. First, we need to clarify what these organisms are.

2. **Classification**: Both Ulothrix and Spirogyra are not fungi. They are classified as algae. Algae are simple, photosynthetic organisms that can be found in various aquatic environments.

3. **Characteristics of Ulothrix**:
- **Type**: Ulothrix is a filamentous green alga.
- **Habitat**: It can be found in both marine and freshwater environments.
- **Cell Structure**: Each cell of Ulothrix contains a nucleus and a vacuole, which stores food. It also has chloroplasts for photosynthesis.

4. **Characteristics of Spirogyra**:
- **Type**: Spirogyra is also a green alga.
- **Habitat**: It is primarily found in freshwater.
- **Cell Structure**: Spirogyra is characterized by its spiral-shaped chloroplasts. It consists of thin, unbranched filaments and is known as free-floating algae.

5. **Conclusion**: Therefore, the statement that Ulothrix and Spirogyra are types of fungi is incorrect. They are both types of green algae.

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