In Amoeba, `NH_(3)` is excreted through

Options

A. Food vacuole
B. Plasma membrane
C. Contractile vacuole
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Organism**: Recognize that Amoeba is a unicellular organism that lives in freshwater environments.

2. **Identifying Waste Products**: In Amoeba, the primary waste products are carbon dioxide (CO₂) and ammonia (NH₃).

3. **Excretion Process**: The excretion of these waste products occurs through the process of diffusion. This means that waste materials move from an area of higher concentration (inside the Amoeba) to an area of lower concentration (the surrounding water).

4. **Role of Contractile Vacuole**: The contractile vacuole is an organelle in Amoeba that plays a significant role in osmoregulation and waste removal. It collects excess water and waste materials from the cytoplasm.

5. **Mechanism of Excretion**: The waste materials, including ammonia, enter the contractile vacuole. Once filled, the contractile vacuole moves towards the plasma membrane of the Amoeba.

6. **Release of Waste**: The contractile vacuole then fuses with the plasma membrane and bursts, releasing its contents, including ammonia, into the surrounding environment.

7. **Conclusion**: Based on the above steps, the correct answer to the question is that ammonia (NH₃) is excreted through the contractile vacuole.

**Final Answer**: Ammonia (NH₃) is excreted through the contractile vacuole in Amoeba.

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