An example of enucleated living plant cell is

Options

A. RBC
B. sieve tube cell
C. companion cell
D. xylem parenchyma

Answer

**Step-by-Step Solution:**

1. **Understanding Enucleated Cells**: An enucleated cell is a cell that lacks a nucleus. In plants, certain cells can lose their nuclei during maturation.

2. **Identifying the Options**: The options given are:
- a) RBC (Red Blood Cell)
- b) Sieve Tube Cell
- c) Companion Cell
- d) Xylem Parenchyma

3. **Evaluating Each Option**:
- **RBC**: While RBCs are enucleated, they are animal cells, not plant cells. Therefore, this option is not correct for the question.
- **Sieve Tube Cell**: This is a component of the phloem in plants. Sieve tube cells lose their nuclei at maturity to allow for more efficient transport of food materials. This makes it a strong candidate for the answer.
- **Companion Cell**: Companion cells are associated with sieve tube cells and retain their nuclei. They assist in the functioning of sieve tube cells but are not enucleated.
- **Xylem Parenchyma**: This cell type is part of the xylem and retains its nucleus, making it not enucleated.

4. **Conclusion**: The only option that fits the criteria of being an enucleated living plant cell is the **Sieve Tube Cell**.

5. **Final Answer**: The correct answer is **b) Sieve Tube Cell**.

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