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

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Lenticels:**
- Lenticels are small pores found in the bark of woody stems and roots of dicot plants. They facilitate gas exchange between the internal tissues of the plant and the external environment.

2. **Characteristics of Lenticels:**
- Lenticels have a lens-shaped opening.
- They consist primarily of dead cells.
- They contain large intercellular spaces in the periderm (the outer layer of the bark).
- Their main function is to allow for the exchange of gases.

3. **Analyzing the Options:**
- **Option 1:** "They are unprotected openings for gaseous exchange."
- This is related to lenticels as they do facilitate gas exchange.
- **Option 2:** "They show association with epithelium."
- This is not related to lenticels. Lenticels do not have an association with epithelial tissues; they are primarily made up of dead cells and are not lined with epithelium.
- **Option 3:** "They are found on the surface of the trunk."
- This is correct as lenticels are indeed found on the bark surface.
- **Option 4:** "They show presence of loosely arranged complementary cells."
- This is also related to lenticels, as they do have complementary cells that assist in gas exchange.

4. **Conclusion:**
- The option that is not related to lenticels is **Option 2: "They show association with epithelium."**

**Final Answer:**
The character/structure that is not related to lenticels is **Option 2: "They show association with epithelium."**

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