The correct differentiating point between trichome and root hair is

Options

A. Root hair is an epidermal structure while trichome is a hypodermal structure.
B. Root hair is multicellular while trichome is unicellular Root hair helps in water absorption while trichome helps in prevention of water loss
C. Root hair helps in water absorption while trichome helps in prevention of water loss
D. Root hair may be branched or unbranched but trichome is always branched .

Answer

To differentiate between trichomes and root hairs, we can follow these steps:

### Step-by-Step Solution:

1. **Definition of Structures**:
- **Trichomes**: These are hair-like structures found on the stems and leaves of plants. They can be either multicellular or unicellular and serve various functions including reducing water loss through transpiration.
- **Root Hairs**: These are specialized structures found on the roots of plants. They are unicellular extensions of the root epidermal cells and primarily function to absorb water and minerals from the soil.

2. **Cellularity**:
- **Trichomes**: Generally multicellular, which means they are made up of more than one cell.
- **Root Hairs**: Always unicellular, meaning they consist of a single cell.

3. **Location**:
- **Trichomes**: Present on the aerial parts of the plant, such as stems and leaves.
- **Root Hairs**: Located on the root system of the plant.

4. **Function**:
- **Trichomes**: Help in reducing water loss through transpiration and can also provide protection against herbivores and pathogens.
- **Root Hairs**: Primarily involved in the absorption of water and nutrients from the soil.

5. **Branching**:
- **Trichomes**: Can be branched or unbranched, depending on the type of trichome.
- **Root Hairs**: Always unbranched.

6. **Conclusion**:
- The key differentiating point between trichomes and root hairs is that trichomes are generally multicellular and can be branched, while root hairs are always unicellular and unbranched.

### Correct Answer:
The correct differentiating point between trichomes and root hairs is that **trichomes are multicellular and can be branched, while root hairs are unicellular and always unbranched**.