Dicot root is similar in all the given characters to monocot root, except.

Options

A. Radial, exarch vascualr bundles
B. Unicelled root hairs
C. Pericyle forms the lateral roots
D. Well developed pith

Answer

To solve the question regarding the differences between dicot and monocot roots, we will analyze the characteristics of both types of roots step by step.

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**:
- In both dicot and monocot roots, the vascular bundles are arranged in a radial pattern. This means that the xylem and phloem are arranged alternately. Therefore, this characteristic is similar in both types of roots.

2. **Examining the Arrangement of Xylem and Phloem**:
- In dicots, the protoxylem (smaller cells) is located towards the outer side, while the metaxylem (larger cells) is located towards the inner side. This arrangement is also found in monocots, making this characteristic similar as well.

3. **Root Hairs**:
- Both dicot and monocot roots have unicellular root hairs. This is another characteristic that is common to both types of roots.

4. **Lateral Roots Formation**:
- The parenchyma layer (paricycle) in both dicot and monocot roots is responsible for forming lateral roots. This characteristic is also shared by both types of roots.

5. **Pit Development**:
- The pit (central region of the root) is well-developed in monocots, while in dicots, it is not as pronounced. This is a significant difference between the two types of roots.

6. **Conclusion**:
- After analyzing all the characteristics, we find that the only characteristic that is not similar between dicot and monocot roots is the development of the pit. Therefore, the correct answer is that dicot roots are similar to monocot roots in all given characters except for the well-developed pit.

### Final Answer:
Dicot root is similar in all the given characters to monocot root, except for the well-developed pit.

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