In young root the most active absorption of water takes place through:

Options

A. Root cap region
B. Root hair region
C. endodermis
D. Mature region with a corky layer

Answer

To answer the question, "In young root, the most active absorption of water takes place through:", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structures in Roots**:
- The roots have various structures that play a role in water absorption, including the root cap, root hairs, endodermis, and mature regions with a corky layer.

2. **Understand the Function of Each Structure**:
- **Root Cap**: Protects the growing tip of the root but is not primarily involved in water absorption.
- **Root Hairs**: These are tiny, hair-like extensions of the root epidermal cells that significantly increase the surface area for absorption.
- **Endodermis**: This is a layer of cells that regulates the flow of water and nutrients but is not the primary site of absorption.
- **Mature Region with Corky Layer**: This area is more about protection and does not contribute to active absorption.

3. **Focus on Root Hairs**:
- Root hairs are specifically designed for the absorption of water. They are thin-walled and slender, allowing for efficient uptake of water from the soil.

4. **Mechanism of Water Absorption**:
- Water is absorbed by root hairs primarily through the process of diffusion, where water moves from an area of higher concentration in the soil to an area of lower concentration inside the root hairs.

5. **Conclusion**:
- Based on the above points, we conclude that the most active absorption of water in young roots takes place through the **root hair region**.

### Final Answer:
In young root, the most active absorption of water takes place through the **root hair region**.

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