Which of the following plant cells show totipotency ?

Options

A. Cork cells , meristem , spores
B. Meristem, zygote , spores
C. Spores, zygote, xylem vessels
D. Sieve tube , zygote , spores

Answer

To determine which plant cells show totipotency, we need to understand the concept of totipotency and analyze the options provided.

### Step-by-Step Solution:

1. **Understanding Totipotency**:
- Totipotency is the ability of a single cell to divide and develop into a complete organism or differentiate into various cell types. This characteristic is primarily found in certain plant cells.

2. **Identifying the Options**:
- The options provided include cork cells, meristem cells, spores, zygotes, xylem vessels, and sieve tubes.

3. **Analyzing Each Cell Type**:
- **Cork Cells**: These are mature cells that do not divide. Therefore, they do not exhibit totipotency.
- **Meristem Cells**: These are actively dividing cells found at the tips of roots and shoots. They are totipotent as they can differentiate into various types of cells.
- **Spores**: These are reproductive cells that can develop into a new organism. They are also considered totipotent.
- **Zygote**: This is the fertilized egg cell that can divide and develop into a complete organism. Thus, it is totipotent.
- **Xylem Vessels**: These are mature cells that transport water and nutrients. They do not divide and are not totipotent.
- **Sieve Tubes**: These are also mature cells involved in transporting sugars. They do not divide and are not totipotent.

4. **Conclusion**:
- The cells that exhibit totipotency from the options given are **meristem cells, zygotes, and spores**.

### Final Answer:
The plant cells that show totipotency are **meristem cells, zygotes, and spores**.

---