In reptiles, the skin is covered by

Options

A. Plates
B. Horny scales
C. Horny scutes
D. All of the above but not in one animal

Answer

**Step-by-Step Solution:**

1. **Understanding Reptilian Skin**: Reptiles have a unique skin structure that is adapted to their environment. The skin plays a crucial role in protection and moisture retention.

2. **Identifying Skin Coverings**: The skin of reptiles can be covered by different types of structures:
- **Plates**: These are bony structures made from the dermis. They are found in certain reptiles like pangolins and tortoises.
- **Horny Scales**: These are epidermal scales that are an extension of the stratum corneum, the outermost layer of the skin. They are present in reptiles like crocodiles.
- **Horny Scutes**: These are also layers of upper epidermal skin and can be found in crocodiles and lizards.

3. **Conclusion**: Since reptiles can have different types of skin coverings (plates, horny scales, and horny scutes), the correct answer to the question is that the skin of reptiles is covered by all of the above options, but not necessarily in one single species.

4. **Final Answer**: Therefore, the correct option is "all of the above."

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