In a vascular bundle, xylem shows centripetal development. It is

Options

A. Centrach
B. Mesarch
C. Endarch
D. Exarch

Answer

To answer the question regarding the centripetal development of xylem in a vascular bundle, we can break down the concepts step by step.

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**: Vascular bundles are structures in plants that contain xylem and phloem. Xylem is responsible for the transport of water and minerals, while phloem transports food.

2. **Centripetal Development**: The term "centripetal development" refers to the growth pattern of xylem where the xylem elements develop towards the center of the stem or root.

3. **Types of Xylem Development**: There are different types of xylem development:
- **Exarch**: In this condition, the protoxylem (the first-formed xylem) is located on the outer side, while the metaxylem (the later-formed xylem) is located inward. This is characterized by the development of xylem elements outward.
- **Endarch**: In this condition, the protoxylem is found towards the center, and the metaxylem is located outward. This is characterized by centripetal development.
- **Mesarch**: In this condition, xylem elements develop from the middle towards both the center and the periphery.
- **Centric**: This condition has a single chamber of xylem surrounded by protoxylem.

4. **Identifying the Correct Type**: Since the question specifies "centripetal development," we need to identify which type of xylem development corresponds to this description.
- The endarch condition is characterized by the protoxylem being located towards the center, which aligns with the centripetal development concept.

5. **Conclusion**: Therefore, in a vascular bundle, xylem shows centripetal development in the **endarch** condition.

### Final Answer:
In a vascular bundle, xylem shows centripetal development. It is **endarch**.