Centripetal xylem is present in

Options

A. dicot stem
B. dicot root
C. monocot stem
D. branches of stem

Answer

**Step-by-Step Solution:**

1. **Understanding Centripetal Xylem**:
- Centripetal xylem refers to the growth of xylem tissue from the outside towards the inside of the plant. This means that as the plant grows, the xylem develops inward, towards the center.

2. **Identifying the Location of Centripetal Xylem**:
- This type of xylem is primarily found in the roots of vascular plants, particularly in dicotyledonous plants (dicots).

3. **Differentiating Between Dicot and Monocot**:
- In dicot roots, the protoxylem (the first-formed xylem) is located towards the periphery, while the metaxylem (the later-formed xylem) is positioned towards the center. This arrangement is known as centripetal development.

4. **Understanding Exarch vs. Endarch**:
- The term "exarch" refers to the arrangement where the protoxylem is located at the outer edge and the metaxylem is towards the center. In contrast, "endarch" would mean the opposite arrangement, which is not applicable here.

5. **Conclusion**:
- Given that centripetal xylem is found in the roots of dicot plants, the correct answer to the question is that centripetal xylem is present in dicot roots.

**Final Answer**: Centripetal xylem is present in the roots of dicotyledonous plants.

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