Amoeba stops producing pseudopodia during

Options

A. Alkaline condition
B. Starvation
C. Acidic condition
D. Touch

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Amoeba**:
- Amoeba is a shapeless unicellular organism that can change its shape by extending parts of its cell membrane called pseudopodia.

2. **Function of Pseudopodia**:
- Pseudopodia are used for locomotion and for capturing food through a process known as phagocytosis. The formation of pseudopodia is influenced by the fluidity of the plasma membrane.

3. **Conditions Affecting Pseudopodia Formation**:
- The question asks under which condition amoeba stops producing pseudopodia. The options provided are:
- Alkaline condition
- Starvation
- Acidic condition
- Touch

4. **Analyzing Each Option**:
- **Alkaline Condition**: This does not significantly affect the amoeba's ability to produce pseudopodia.
- **Starvation**: During starvation, the amoeba undergoes changes in its plasma membrane. It forms a protective cyst, which is a thick covering that prevents the formation of pseudopodia.
- **Acidic Condition**: Similar to alkaline conditions, acidic conditions do not inhibit pseudopodia production.
- **Touch**: The amoeba can still produce pseudopodia when touched; it does not stop due to this stimulus.

5. **Conclusion**:
- The correct answer is **starvation**. During starvation, the amoeba's plasma membrane thickens and forms a cyst, which inhibits the formation of pseudopodia.

**Final Answer**: Amoeba stops producing pseudopodia during **starvation**.

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