As we go from periphery to the center of a dicot root , the correct order of tissues that we will encounter is

Options

A. Epiblema - Cortex - Endodermis - Metaxylem - Protoxylem - Pith
B. Cortex - Epiblema - Endodermis - Metaxylem - Protoxylem - Pith
C. Cortex - Epiblema - Endodermis - Protoxylem - Metaxylem - Pith
D. Epiblema - Cortex - Endodermis - Protoxylem - Metaxylem - Pith

Answer

To solve the question regarding the order of tissues encountered when moving from the periphery to the center of a dicot root, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Outermost Layer**:
- The outermost layer of a dicot root is the **epidermis**. This layer serves as a protective covering for the root.

2. **Specialization of Epidermis**:
- The epidermis in roots is specialized and is also referred to as **epiblema**. It has small tubular outgrowths known as **root hairs** that help in the absorption of water and nutrients.

3. **Next Layer - Cortex**:
- Beneath the epidermis, we encounter the **cortex**. The cortex is primarily composed of parenchyma cells, which are thin-walled and serve in storage and transport.

4. **Inner Layer - Endodermis**:
- Following the cortex, we reach the **endodermis**. The endodermis is characterized by its thick-walled cells and contains a waxy substance called **suberin**, forming the Casparian strip, which regulates the flow of water and nutrients.

5. **Vascular Bundles**:
- After the endodermis, we find the **vascular bundles**. In a dicot root, the vascular tissue consists of xylem and phloem. The xylem is arranged in a way that the **protoxylem** (the first formed xylem) is located towards the outside, while the **metaxylem** (the later formed xylem) is found towards the inside.

6. **Innermost Region - Pith**:
- Finally, at the center of the root, we have the **pith**, which is composed of parenchyma cells and serves as a storage area.

### Correct Order of Tissues:
Thus, the correct order of tissues from the periphery to the center of a dicot root is:
1. **Epidermis (Epiblema)**
2. **Cortex**
3. **Endodermis**
4. **Vascular Bundles (Xylem and Phloem)**
5. **Pith**

### Final Answer:
The correct answer is **D: Epiblema, Cortex, Endodermis, Vascular Bundles, Pith**.