Amphibians do not have the following

Options

A. Three chambered heart
B. Gills or lungs
C. Scales
D. Mucous glands

Explanation

**Step-by-Step Solution:**

1. **Understanding Amphibians**: Amphibians include animals such as frogs, toads, and salamanders. They are known for their unique life cycle, which typically includes both aquatic (tadpole) and terrestrial (adult) stages.

2. **Identifying Key Features**: Amphibians possess several distinct features:
- They have a three-chambered heart.
- They possess both gills (in the tadpole stage) and lungs (in the adult stage) for respiration.
- They have moist skin that aids in respiration and is supported by mucous glands.

3. **Comparing with Other Groups**: Unlike reptiles and fish, amphibians do not have scales. Scales are a characteristic feature of reptiles and fish, which help in protection and reduce water loss.

4. **Conclusion**: Based on the characteristics of amphibians, the statement that they do not have scales is correct. Therefore, the answer to the question "Amphibians do not have the following" is scales.

**Final Answer**: Amphibians do not have scales.

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