in dicot root, the outermost layer of tubular living cells is

Options

A. rhizoedermis
B. epidermis
C. hypodermis
D. exodermis

Answer

To answer the question "In dicot root, the outermost layer of tubular living cells is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Dicot Roots**: Dicot roots have a specific arrangement of tissues. The outermost layer is crucial for understanding the root's anatomy.

2. **Identify the Layers**: The layers of a dicot root include:
- Rhizodermis
- Epidermis
- Hypodermis
- Exodermis

3. **Evaluate Each Layer**:
- **Rhizodermis**: This is often referred to as the outermost layer in some contexts and contains living cells that are tubular in nature.
- **Epidermis**: This is the outermost layer of the root but does not contain tubular living cells.
- **Hypodermis**: This layer is typically absent in dicot roots.
- **Exodermis**: This layer is present but has suberized cell walls, which means it is not made up of living cells.

4. **Determine the Correct Answer**: Based on the definitions and characteristics of each layer, the correct answer to the question is **Rhizodermis**, as it is the outermost layer that consists of living tubular cells.

### Final Answer:
The outermost layer of tubular living cells in a dicot root is **Rhizodermis**.

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