Trypanosoma gambiense is

Options

A. digenetic
B. monogenetic
C. polygenetic
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding Trypanosoma gambiense**:
- Trypanosoma gambiense is a unicellular eukaryotic parasite that infects humans and is responsible for a disease known as African sleeping sickness.

2. **Identifying the Type of Life Cycle**:
- The question asks whether Trypanosoma gambiense is digenetic, monogenetic, polygenetic, or none of these.
- To answer this, we need to understand the terms:
- **Digenetic**: Organisms that have two hosts in their life cycle.
- **Monogenetic**: Organisms that have one host in their life cycle.
- **Polygenetic**: Organisms that have multiple hosts in their life cycle.

3. **Analyzing the Life Cycle of Trypanosoma gambiense**:
- Trypanosoma gambiense has a digenetic life cycle, meaning it requires two hosts to complete its life cycle.
- The two hosts involved are:
- **Definitive Host**: Humans, where the parasite matures and reproduces.
- **Intermediate Host**: The tsetse fly (scientific name: Glossina palpalis), which transmits the parasite to humans.

4. **Conclusion**:
- Since Trypanosoma gambiense requires both humans and the tsetse fly to complete its life cycle, it is classified as digenetic.

5. **Final Answer**:
- Therefore, the correct answer to the question is that Trypanosoma gambiense is **digenetic**.

---