Waxy coating on epidermis of young stem is
(a) suberin
(b) periderm
(c) phellem
(d) cuticle

Options

A. suberin
B. periderm
C. pellem
D. cuticle

Answer

To determine the waxy coating on the epidermis of a young stem, we need to evaluate each option provided in the question.

1. **Understanding the Options**:
- **Suberin**: This is a waterproof waxy substance found in the cell walls of certain plant tissues, particularly in cork cells. However, it does not specifically cover the epidermis.
- **Periderm**: This is a protective secondary tissue that replaces the epidermis in older stems and roots. It is not a waxy coating and does not cover the epidermis.
- **Phellem**: Also known as cork, phellem is made up of dead cells and serves as a protective layer. It does not provide a waxy coating on the epidermis.
- **Cuticle**: This is a waxy layer that covers the epidermis of young stems and helps to prevent water loss through transpiration.

2. **Analyzing Each Option**:
- **Option A (Suberin)**: Incorrect, as it does not cover the epidermis.
- **Option B (Periderm)**: Incorrect, as it is a secondary tissue that replaces the epidermis and is not a waxy coating.
- **Option C (Phellem)**: Incorrect, as it is cork and does not provide a waxy coating.
- **Option D (Cuticle)**: Correct, as it is the waxy layer present on the epidermis of young stems.

3. **Conclusion**:
The correct answer is **(d) cuticle**, as it is the waxy coating on the epidermis of a young stem that helps prevent water loss.