Which of the following cell is totipotent

Options

A. (a) Meristem
B. (b) Sieve tube
C. (c) Collenchyma
D. (d) Xylem vessel

Answer

To determine which of the following cells is totipotent, we need to understand the concept of totipotency and evaluate the options provided.

### Step-by-Step Solution:

1. **Understanding Totipotency**:
- Totipotency refers to the ability of a cell to divide and differentiate into any type of cell in an organism. This means that a totipotent cell can give rise to a complete organism.

2. **Identifying Cell Types**:
- We need to analyze the options given in the question to identify which cell type possesses totipotency.

3. **Option A - Meristematic Cells**:
- Meristematic cells are undifferentiated cells found in plants. They are responsible for the growth of the plant and can divide and differentiate into various types of cells (roots, stems, leaves, etc.). Thus, meristematic cells are totipotent.

4. **Option B - Sieve Tubes**:
- Sieve tubes are specialized cells in the phloem that are involved in the transport of sugars. They are differentiated cells and do not have the ability to divide or differentiate into other cell types. Therefore, they are not totipotent.

5. **Option C - Collenchyma**:
- Collenchyma cells are also differentiated cells that provide structural support to the plant. They are not capable of dividing and differentiating into other cell types, which means they are not totipotent.

6. **Option D - Xylem Vessels**:
- Xylem vessels are specialized cells that transport water and minerals in plants. Like the other differentiated cells mentioned, they do not possess the ability to divide or differentiate into other cell types. Thus, they are not totipotent.

7. **Conclusion**:
- After analyzing all the options, we conclude that the only totipotent cell type among the options is **A - Meristematic Cells**.

### Final Answer:
**A - Meristematic Cells**

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