What are the function of dermatogen?

Explanation

**Step-by-Step Solution:**

1. **Definition of Dermatogen**: Dermatogen is the outermost layer of the apical meristem in plants. It is a single layer of cells that plays a crucial role in the development of plant tissues.

2. **Formation of Epidermis**: In stems, the cells of dermatogen divide to form the epidermis, which is the protective outer layer of the plant. The epidermis serves as a barrier against environmental factors and helps in reducing water loss.

3. **Role in Roots**: In the case of roots, the dermatogen contributes to the formation of a tissue mass called caliptrogen. This tissue is also meristematic, meaning it has the ability to divide and contribute to growth.

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