As a result of activity of phellogen, cork is fomed in dicot roots

Options

A. just inner to the epidermis
B. just inner to endodermis
C. just inner to outer cortex
D. just outside the primary cortex

Answer

### Step-by-Step Solution:

1. **Understanding Phellogen**: Phellogen, also known as cork cambium, is a type of lateral meristem that is responsible for the production of cork (phellem) in plants. It is crucial for the secondary growth in dicot roots.

2. **Location of Phellogen**: In dicot roots, phellogen is located just beneath the epidermis. The epidermis is the outermost layer of the root, and phellogen lies directly underneath it.

3. **Formation of Cork**: The phellogen divides to produce two types of cells:
- **Phellem (Cork)**: These cells are produced towards the outside and form the protective outer layer of the root.
- **Phelloderm**: These cells are produced towards the inside and contribute to the inner tissues of the root.

4. **Cork Structure**: The cork (phellem) is formed as a result of the activity of the phellogen. It is a protective layer that helps in preventing water loss and protects the underlying tissues from physical damage and pathogens.

5. **Conclusion**: Therefore, as a result of the activity of phellogen, cork is formed in dicot roots, specifically just beneath the epidermis.