If pond of water becomes dry, Amoeba will

Options

A. enter in soil
B. enter in body of vertebrates
C. attach with gills of fishes
D. undergo encystment.

Answer

**Step-by-Step Solution:**

1. **Understanding the Environment**: The question states that a pond of water becomes dry. This indicates that the environment is becoming adverse for the amoeba, which is a unicellular organism that thrives in aquatic environments.

2. **Amoeba's Survival Mechanism**: In adverse environmental conditions, such as a lack of water, amoeba has a survival mechanism known as encystment. This is a process that allows amoeba to withstand unfavorable conditions.

3. **Process of Encystment**: During encystment, the amoeba undergoes several changes:
- It becomes circular in shape.
- It loses most of its water content to prevent dehydration.
- It secretes a protective covering known as a cyst membrane.

4. **Function of the Cyst Membrane**: The cyst membrane serves as a protective barrier for the amoeba, allowing it to survive until conditions improve. This membrane helps to protect the amoeba from desiccation and other environmental stresses.

5. **Resuming Activity**: Once the environment becomes favorable again (for example, when water returns to the pond), the cyst membrane ruptures, and the amoeba can emerge from its dormant state to resume normal activities.

6. **Conclusion**: Therefore, if a pond of water becomes dry, the amoeba will undergo encystment as a survival strategy.

**Final Answer**: If the pond of water becomes dry, amoeba will undergo encystment.

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