Which group possesses an exoskelecton of scales and paired copulatory organs

Options

A. Shark
B. Urodela
C. Lizards
D. Urochordata

Answer

To solve the question "Which group possesses an exoskeleton of scales and paired copulatory organs?", we can follow these steps:

### Step 1: Understand the Question
The question is asking for a specific group of organisms that have two characteristics:
1. An exoskeleton made of scales.
2. Paired copulatory organs.

### Step 2: Analyze the Options
We have four options to consider:
- Shark
- Urodela
- Lizards
- Urochordata

### Step 3: Evaluate Each Option
1. **Shark**:
- Sharks have a cartilaginous skeleton and do not possess an exoskeleton made of scales in the same way reptiles do. Additionally, sharks have unpaired copulatory organs. Therefore, this option is incorrect.

2. **Urodela**:
- Urodela refers to a group of amphibians (like salamanders) that also do not have an exoskeleton of scales. Their copulatory organs are unpaired as well. Thus, this option is also incorrect.

3. **Lizards**:
- Lizards belong to the class Reptilia and specifically to the order Squamata. They possess an exoskeleton made of scales, which are derived from the epidermis. Furthermore, male lizards have paired copulatory organs. Therefore, this option is correct.

4. **Urochordata**:
- Urochordata is a subphylum of Chordata that includes tunicates. These organisms do not have scales or paired copulatory organs. Hence, this option is incorrect.

### Step 4: Conclusion
After evaluating all the options, the only group that possesses both an exoskeleton of scales and paired copulatory organs is **Lizards**.

### Final Answer
The correct answer is **Lizards** (Option C).

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