Which structure is responsible for excretion in Amoeba?

Options

A. contractile vacuole
B. pseudopodia
C. Nucleus
D. protoplasm

Answer

To determine which structure is responsible for excretion in Amoeba, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structures in Amoeba**:
- The main structures to consider in Amoeba include the nucleus, pseudopodia, protoplasm (cytoplasm), food vacuole, and contractile vacuole.

2. **Understand the Functions of Each Structure**:
- **Nucleus**: Contains genetic material and is responsible for controlling cellular activities, not excretion.
- **Pseudopodia**: Known as false feet, they are used for movement and capturing food, not for excretion.
- **Protoplasm (Cytoplasm)**: This is the living content of the cell but does not perform the excretion function.
- **Food Vacuole**: This structure is involved in the digestion of food but does not directly excrete waste.
- **Contractile Vacuole**: This structure is specifically involved in the excretion of waste materials from the cell.

3. **Determine the Correct Structure**:
- Based on the functions identified, the contractile vacuole is the only structure that is responsible for excretion in Amoeba. It collects waste materials and expels them from the cell through a process of contraction and relaxation.

4. **Conclusion**:
- The correct answer to the question is **contractile vacuole**.

### Final Answer:
The structure responsible for excretion in Amoeba is the **contractile vacuole**.

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