Only primary cell wall is present in the cells of

Options

A. Transfer cells
B. Xylem fibres
C. Meristematic cells
D. Sclereids

Answer

**Step-by-Step Solution:**

1. **Understanding the Primary Cell Wall**: The primary cell wall is a thin, flexible, and extensible layer found in plant cells. It is primarily composed of cellulose, pectin, and glycoproteins. Its main function is to provide support and allow for cell growth and division.

2. **Analyzing the Options**:
- **Transfer Cells**: These cells are specialized for transport and are associated with the plasma membrane. They do not solely possess a primary cell wall.
- **Xylem Fibers**: Xylem fibers are dead cells that provide structural support. They have thick secondary walls and do not contain only a primary cell wall.
- **Meristematic Cells**: These are actively dividing cells found in regions of growth (like tips of roots and shoots). They require a primary cell wall that is thin and flexible to facilitate cell division.
- **Sclerides**: These are hard, protective cells that contribute to the hardness of plant tissues. They do not have a primary cell wall as they are specialized for structural support.

3. **Identifying the Correct Answer**: Among the options, only meristematic cells possess only a primary cell wall. This is because they are living cells that need to divide and grow, which requires the flexibility and extensibility provided by the primary cell wall.

4. **Conclusion**: The correct answer is **meristematic cells**, as they are the only type of cells listed that exclusively have a primary cell wall.

---