In cockroaches, the sclerite are joined to each other by

Options

A. a thin and flexible articular membrane.
B. the thin and flexible muscles of the targites .
C. the thin and flexible muscles of the sternites .
D. the extended membrane of the wings.

Answer

To answer the question "In cockroaches, the sclerite are joined to each other by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sclerites**:
- In cockroaches, the body is covered by a hard structure known as the exoskeleton. This exoskeleton is composed of various hard plates called sclerites.

2. **Function of Sclerites**:
- Sclerites provide structural support and protection to the cockroach. They are essential for maintaining the shape of the body and protecting internal organs.

3. **Joining Mechanism**:
- The sclerites do not connect directly to each other; instead, they are joined by a flexible structure.

4. **Identifying the Joining Structure**:
- The flexible membrane that connects the sclerites is known as the articular membrane. This membrane allows for movement between the sclerites while maintaining the integrity of the exoskeleton.

5. **Conclusion**:
- Therefore, the correct answer to the question is that in cockroaches, the sclerites are joined to each other by the articular membrane.

### Final Answer:
In cockroaches, the sclerites are joined to each other by the articular membrane.

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