Lenticels are spongy regions on the surface of some woody old stem that function in -

Options

A. Gaseous exchange
B. Transpiration
C. Both
D. Water conservation

Answer

### Step-by-Step Solution:

1. **Definition of Lenticels**:
- Lenticels are small, spongy openings found on the surface of some woody stems, particularly in older stems.

2. **Function of Lenticels**:
- The primary function of lenticels is to facilitate gas exchange. They allow for the movement of gases such as oxygen and carbon dioxide between the internal tissues of the plant and the external environment.

3. **Role in Respiration**:
- Lenticels are crucial for the respiration process in plants. They enable the uptake of oxygen, which is essential for cellular respiration, and the release of carbon dioxide, a byproduct of this process.

4. **Importance in Plant Health**:
- By allowing gas exchange, lenticels contribute to the overall health of the plant, ensuring that it can perform necessary metabolic functions efficiently.

5. **Conclusion**:
- In summary, lenticels are spongy regions on the surface of woody stems that function primarily in gas exchange, facilitating the uptake of oxygen and the release of carbon dioxide.