All of the following are component of bark except.

Options

A. Cork
B. Periderm
C. Secondary xylem
D. Secondary phloem

Answer

To solve the question "All of the following are components of bark except," we need to identify the components of bark and determine which option does not belong to that category.

### Step-by-Step Solution:

1. **Understand the Definition of Bark**: Bark is a non-technical term that refers to the outer layers of a tree. It includes various components that protect the tree and facilitate transport.

2. **Identify the Components of Bark**: The main components of bark include:
- **Cork (Phallum)**: The outermost layer that provides protection.
- **Periderm**: This is a term that encompasses the cork and other layers.
- **Secondary Phloem**: This layer is responsible for the transport of nutrients and food.

3. **List the Options Given**: The options provided are:
- Cork
- Periderm
- Secondary Cortex
- Secondary Xylem

4. **Analyze Each Option**:
- **Cork**: A component of bark.
- **Periderm**: A term that includes the cork and is part of the bark.
- **Secondary Cortex**: This is also a part of the bark.
- **Secondary Xylem**: This is not a component of bark; it is part of the wood inside the tree.

5. **Conclusion**: The only option that is not a component of bark is the **Secondary Xylem**.

### Final Answer:
The correct answer is **Secondary Xylem**.

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