These are cylindrical meristems

Options

A. Cork cambium
B. Inter fascicular cambium
C. Fascicular vascular cambium
D. Apical meristems

Answer

**Step-by-Step Solution:**

1. **Understanding Meristems**:
- Meristems are regions in plants where cells are actively dividing. They are responsible for growth in plants. There are two main types of meristems: primary and secondary.

2. **Identifying Types of Meristems**:
- Primary meristems are involved in the initial growth of the plant and are typically rectangular in shape. They include:
- Apical meristem (located at the tips of roots and shoots)
- Fascicular vascular cambium (found within vascular bundles)
- Interfascicular cambium (located between vascular bundles)

3. **Understanding Lateral Meristems**:
- Lateral meristems, also known as secondary meristems, contribute to the increase in girth (thickness) of the plant. They are cylindrical in shape.

4. **Identifying the Correct Option**:
- Among the options given:
- Cork cambium: This is a lateral meristem that is cylindrical in shape and contributes to the formation of bark.
- Interfascicular cambium: This is a primary meristem and is rectangular in shape.
- Fascicular vascular cambium: This is also a primary meristem and is rectangular in shape.
- Apical meristem: This is a primary meristem and is rectangular in shape.
- Since the question specifically asks for cylindrical meristems, the only correct answer is cork cambium.

5. **Conclusion**:
- Therefore, the answer to the question "These are cylindrical meristems" is **cork cambium**.

---