In each segment of cockroach, the exoskeleton has hardened plates called :

Options

A. Ossicles
B. Keratin
C. Sclerites
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the hardened plates found in the exoskeleton of each segment of a cockroach.

2. **Analyzing the Options**:
- **Option 1: Ossicles** - These are small bones found in the middle ear of vertebrates and are not related to the exoskeleton of cockroaches.
- **Option 2: Carotene** - This is a type of protein found in various structures of vertebrates, such as hair and nails, but it does not refer to the hardened plates in cockroaches.
- **Option 3: Sclerites** - This is the correct term for the hardened plates that make up the exoskeleton of cockroaches.
- **Option 4: Nonopties** - This term does not relate to the exoskeleton of cockroaches and is incorrect.

3. **Selecting the Correct Answer**: Based on the analysis, the correct answer is **Sclerites**, as they are the hardened plates present in the exoskeleton of cockroaches.

4. **Conclusion**: The hardened plates in each segment of a cockroach's exoskeleton are called **Sclerites**.

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