Amoeba touched with needle will

Options

A. Die
B. Divide quickly
C. Develop pseudopodia
D. Move away.

Answer

**Step-by-Step Solution:**

1. **Understanding the Organism**:
- Amoeba is a unicellular eukaryotic organism that belongs to the kingdom Protista. It does not have specialized sense organs like higher organisms.

2. **Response to Stimuli**:
- Amoeba can respond to various stimuli such as light, temperature, and touch. When it encounters a stimulus, it reacts through a simple reflex action.

3. **Touch Stimulus**:
- In this scenario, the stimulus is a touch from a needle. Amoeba will perceive this touch as a potential threat.

4. **Immediate Reaction**:
- The immediate reaction of the amoeba to the touch (stimulus) is to move away from it. This is a reflex action to avoid harm.

5. **Role of Pseudopodia**:
- Amoeba uses pseudopodia (temporary projections of its cytoplasm) to facilitate movement. While pseudopodia are involved in the movement away from the stimulus, they do not develop as a direct response to the touch.

6. **Evaluating the Options**:
- **Die**: Incorrect, as amoeba will not die from a touch stimulus.
- **Divide quickly**: Incorrect, as division (binary fission) is not a response to immediate stimuli.
- **Develop pseudopodia**: Incorrect, as pseudopodia are already present and do not develop in response to the stimulus.
- **Move away**: Correct, as amoeba will move away from the needle to avoid the stimulus.

7. **Conclusion**:
- The correct answer is that amoeba touched with a needle will **move away**.

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