Lenticels do not occur on

Options

A. Pericycle
B. root
C. leaf
D. fruit

Answer

### Step-by-Step Solution:

1. **Understanding Lenticels**:
- Lenticels are specialized structures found on the surface of certain plant organs. They are porous tissues that consist of cells with large intracellular spaces.
- These structures facilitate gas exchange in plants, allowing oxygen and carbon dioxide to move in and out.

2. **Location of Lenticels**:
- Lenticels are primarily found in the periderm of secondary thickened organs, which includes the bark of woody stems and the roots of dicot flowering plants.
- They are important for the respiration of the plant, especially in woody plants where the outer layers can become thick and impermeable to gases.

3. **Identifying Where Lenticels Are Absent**:
- While lenticels are present in many parts of woody plants, they are notably absent in certain areas.
- Specifically, lenticels do not occur on leaves. Leaves have a different structure for gas exchange, primarily through stomata, which are small openings that allow for the exchange of gases.

4. **Conclusion**:
- Therefore, the answer to the question "Lenticels do not occur on" is **leaves**.