Which of these character/structure is not related to lenticels?

Options

A. They are unprotected openings for gaseous exchange
B. They are found on surface of trunk.
C. They show presence of loosely arranged complementary cells.
D. They show association with epithem.

Answer

To determine which character or structure is not related to lenticels, we will analyze the characteristics of lenticels and then evaluate the provided options.

### Step-by-Step Solution:

1. **Understanding Lenticels**:
- Lenticels are small openings in the bark of woody plants that facilitate gas exchange. They are found in the periderm layer of the plant.

2. **Characteristics of Lenticels**:
- **Presence of Intercellular Spaces**: Lenticels have large intercellular spaces that allow for the movement of gases.
- **Lens-shaped Openings**: The openings of lenticels are typically lens-shaped.
- **Location**: They are primarily found in the bark of trees.
- **Composition**: Lenticels consist of dead cells.
- **Function**: Their main function is to facilitate gaseous exchange between the internal tissues of the plant and the external environment.

3. **Evaluating Options**:
- **Option 1**: "They are unprotected openings for gaseous exchange."
- This statement is somewhat misleading. While lenticels do facilitate gas exchange, they are not entirely unprotected as they are part of the bark structure.
- **Option 2**: "They are found on the surface of the trunk."
- This is a correct statement since lenticels are indeed found on the bark of the trunk.
- **Option 3**: "They show presence of loosely arranged complementary cells."
- This is true as lenticels do have complementary cells that are loosely arranged, contributing to the intercellular spaces.
- **Option 4**: "They show association with the epithelium."
- This statement is also true, as lenticels are associated with the epidermis and underlying tissues.

4. **Conclusion**:
- The option that is not related to lenticels is **Option 1**: "They are unprotected openings for gaseous exchange." This is because while they do facilitate gas exchange, the term "unprotected" is misleading.

### Final Answer:
**Option 1** is the correct answer as it is not accurately describing lenticels.