The condition , where first formed xylem element faces the pericyle is called as :

Options

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

Answer

To solve the question regarding the condition where the first formed xylem element faces the pericycle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Xylem Structure**:
- Xylem is a type of vascular tissue in plants responsible for the conduction of water and minerals from the roots to other parts of the plant.

2. **Identify Xylem Types**:
- Xylem consists of two main types of elements: protoxylem and metaxylem.
- Protoxylem is the first formed xylem that develops during the growth of the plant.

3. **Define the Orientation**:
- In certain arrangements, the protoxylem can face different directions relative to other tissues.
- In the case of exarch condition, the protoxylem faces outward towards the periphery, while the metaxylem is located towards the center.

4. **Relate to Pericycle**:
- The pericycle is a layer of cells located just inside the endodermis in roots, and it plays a role in the formation of lateral roots.
- In the exarch condition, since the protoxylem faces the pericycle, we can conclude that this specific orientation is characteristic of exarch xylem.

5. **Conclude the Answer**:
- Therefore, the condition where the first formed xylem elements face the pericycle is called "exarch".

### Final Answer:
The condition where the first formed xylem element faces the pericyle is called **exarch**.

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