Exodermis occurs in

Options

A. stem
B. monocot root
C. dicot root
D. leaf

Answer

**Step-by-Step Solution:**

1. **Understanding Exodermis**: Exodermis is a specialized layer of cells that acts as a protective barrier in plants. It is a type of hypodermis that forms beneath the epidermis.

2. **Location of Exodermis**: The exodermis is typically found in the outer cortex of roots, particularly in monocotyledonous plants (monocots).

3. **Formation of Exodermis**: The exodermis develops when the outer layer of the cortex becomes suberized, meaning that the cells are impregnated with a waxy substance called suberin. This process often occurs when the epidermis is lost or damaged.

4. **Function of Exodermis**: The primary role of the exodermis is to provide protection and to regulate the movement of water and nutrients into the plant. It acts as a physiological barrier that helps in the root's function.

5. **Identifying the Correct Answer**: Given the options (stem, monocot root, dicot root, leaf), the exodermis is specifically associated with monocot roots. Therefore, the correct answer is monocot root.

**Final Answer**: Exodermis occurs in monocot root.

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