The endodermis is a part of:

Options

A. Cortex
B. Pericycle
C. Medulla
D. Epidermis

Answer

To solve the question "The endodermis is a part of:", we need to understand the structure and organization of plant tissues, specifically focusing on where the endodermis is located.

### Step-by-Step Solution:

1. **Understanding Plant Tissue Organization**:
- Plants have various types of tissues organized into layers. The outermost layer is called the epidermis, followed by the cortex, and then the vascular tissues.

2. **Identifying the Layers**:
- The epidermis is the outermost layer of the plant.
- Beneath the epidermis is the cortex, which is made up of several layers of cells.

3. **Locating the Endodermis**:
- The endodermis is specifically known as the innermost layer of the cortex. It acts as a selective barrier regulating the flow of water and nutrients into the vascular system.

4. **Differentiating Between Other Tissues**:
- The medulla (or pith) is the central part of the stem or root, and the pericycle is a layer located just inside the endodermis. Neither of these is part of the cortex.

5. **Conclusion**:
- Given that the endodermis is located within the cortex, the correct answer to the question is that the endodermis is a part of the cortex.

### Final Answer:
The endodermis is a part of the cortex.

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