Which group possesses an exoskelecton of scales and paired copulatory organs

Options

A. Sharks
B. Lizard
C. Urodela
D. Urochordata

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which group of animals has an exoskeleton made of scales and paired copulatory organs.

2. **Identifying Key Terms**:
- **Exoskeleton**: A hard outer structure that provides support and protection.
- **Scales**: Thin, flat plates that cover the skin of certain animals.
- **Paired Copulatory Organs**: Organs used for reproduction, specifically for transferring sperm, that come in pairs.

3. **Analyzing the Options**: The options given are shark, lizard, urodela, and urocadeta. We need to evaluate each group based on the criteria of having an exoskeleton of scales and paired copulatory organs.

4. **Evaluating Each Option**:
- **Shark**: Sharks have a cartilaginous skeleton and do not possess an exoskeleton made of scales. They have a different reproductive system.
- **Lizard**: Lizards have an exoskeleton made of horny epidermal scales or bony plates. They also possess paired copulatory organs known as hemipenes.
- **Urodela**: This group includes salamanders and does not have an exoskeleton of scales or paired copulatory organs.
- **Urocadeta**: This term is not commonly used in biological classification and does not fit the criteria.

5. **Conclusion**: Based on the analysis, the group that possesses an exoskeleton of scales and paired copulatory organs is the **lizard**.

**Final Answer**: Lizard

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