The function of undulating membrane in Trypanosoma is

Options

A. To increase the area of absorption
B. To help in movement in viscous blood
C. To catch the food
D. None of the above.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the function of the undulating membrane in Trypanosoma, a parasitic organism.

2. **Identifying the Structure**: The undulating membrane is a structure found in certain parasitic flagellates, including Trypanosoma. It is characterized by a fin-like extension that is associated with the flagella.

3. **Function of the Undulating Membrane**: The primary function of the undulating membrane is to enhance the motility of the organism. This is particularly important in viscous environments, such as blood, where movement can be challenging.

4. **Analyzing the Options**:
- **Option 1**: "To increase the area of absorption" - This is incorrect as the undulating membrane is not primarily involved in absorption.
- **Option 2**: "To help in movement in viscous fluid" - This is correct, as the undulating membrane aids in the movement of Trypanosoma through thick fluids.
- **Option 3**: "To catch the fluid" - This is also incorrect; the membrane does not serve this function.
- **Option 4**: "None of the above" - This is incorrect since option 2 is valid.

5. **Conclusion**: Based on the analysis, the correct answer is that the undulating membrane in Trypanosoma helps in movement in viscous fluid.

### Final Answer:
The function of the undulating membrane in Trypanosoma is to help in movement in viscous fluid.

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