Characteristic autonomy occurs in

Options

A. Lizards
B. Snakes
C. Frogs
D. Cockroaches

Answer

### Step-by-Step Solution:

1. **Understanding Characteristic Autonomy**:
- Characteristic autonomy refers to the ability of certain organisms to deliberately cast off a part of their body as a defense mechanism against predators or threats.

2. **Identifying Organisms with Characteristic Autonomy**:
- Various organisms exhibit this behavior. For instance:
- **Lizards**: They can shed their tails when threatened, allowing them to escape while the predator is distracted by the tail.
- **Crabs**: They can lose limbs (legs) to evade predators.
- **Echinoderms**: Certain species, like holothurians (sea cucumbers), can expel their internal organs as a defense mechanism.

3. **Evaluating the Options**:
- The question asks which organism exhibits characteristic autonomy.
- Among the options provided, lizards are known for their ability to shed their tails, making them a prime example of characteristic autonomy.

4. **Conclusion**:
- Based on the information, the correct answer is that characteristic autonomy occurs in **lizards**.

### Final Answer:
Characteristic autonomy occurs in **lizards**.