Which one of the following protozoans lives in the guts of termites and helps them digest cellulose ?

Options

A. Leishmania
B. Physarum
C. Trichonymph
D. Tetrahymena

Explanation

To solve the question "Which one of the following protozoans lives in the guts of termites and helps them digest cellulose?", we will analyze each of the given options one by one.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Leishmania
- Physarum
- Trichonympha
- Tetrahymena

2. **Analyze Leishmania**:
- Leishmania is a protozoan that is known to cause diseases such as Leishmaniasis.
- It primarily feeds on human blood and is transmitted by sand flies.
- **Conclusion**: Leishmania does not live in the gut of termites, so it is not the correct answer.

3. **Analyze Physarum**:
- Physarum is a type of slime mold that primarily feeds on bacteria.
- It is typically found in soil and is not associated with the digestive systems of animals.
- **Conclusion**: Physarum does not live in the gut of termites, so it is not the correct answer.

4. **Analyze Trichonympha**:
- Trichonympha is a protozoan that is specifically known to inhabit the guts of termites.
- It has a symbiotic relationship with termites, helping them digest cellulose, which is a major component of wood.
- **Conclusion**: Trichonympha lives in the gut of termites and aids in cellulose digestion, making it the correct answer.

5. **Analyze Tetrahymena**:
- Tetrahymena is a unicellular eukaryote that primarily lives in freshwater environments.
- It feeds on bacteria through a process called phagocytosis and is not associated with termites.
- **Conclusion**: Tetrahymena does not live in the gut of termites, so it is not the correct answer.

### Final Answer:
After analyzing all the options, the correct answer is **Trichonympha**, as it lives in the guts of termites and helps them digest cellulose.

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