Which of following plant cells are without vacuoles and without nuclei -

Options

A. Cambium cells
B. Xylem vessels
C. Root hairs
D. Companion cell

Answer

To determine which plant cells are without vacuoles and nuclei, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Options:**
- We have four options: Cambium cells, Xylem vessels, Root hairs, and Companion cells.

2. **Analyzing Cambium Cells:**
- Cambium cells are found between the layers of xylem and phloem.
- They are actively growing cells responsible for the secondary growth of stems and roots.
- **Conclusion:** Cambium cells have vacuoles and nuclei. (Incorrect option)

3. **Analyzing Xylem Vessels:**
- Xylem vessels are long tubes that conduct water and provide mechanical support to plants.
- They are formed by the end-to-end union of many short, wide, and lignified dead cells.
- Importantly, xylem vessels do not contain protoplasm, which means they also lack nuclei and vacuoles.
- **Conclusion:** Xylem vessels do not have vacuoles or nuclei. (Correct option)

4. **Analyzing Root Hairs:**
- Root hairs are tubular outgrowths of trichoblasts, which are hair-forming cells on the root epidermis.
- Root hairs are living cells and contain both vacuoles and nuclei.
- **Conclusion:** Root hairs have vacuoles and nuclei. (Incorrect option)

5. **Analyzing Companion Cells:**
- Companion cells are specialized parenchyma cells found in the phloem of angiosperms.
- They are nucleated cells and contain vacuoles.
- **Conclusion:** Companion cells have vacuoles and nuclei. (Incorrect option)

6. **Final Conclusion:**
- The only option that is without vacuoles and nuclei is **Xylem vessels**.

### Final Answer:
The plant cells that are without vacuoles and without nuclei are **Xylem vessels**.

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