In which of the following characters, a monocot root differs from a dicot root?

Options

A. Radial vascular bundles
B. Large pith
C. Conjuctive tissue in between xylem and pholem
D. Single layered endodermis

Answer

To determine how monocot roots differ from dicot roots, we can analyze the characteristics of each type of root. Here’s a step-by-step solution:

### Step 1: Understand the Structure of Monocot and Dicot Roots
Monocot and dicot roots have distinct structural differences. Monocots typically have a fibrous root system, while dicots have a taproot system.

### Step 2: Examine Vascular Bundle Arrangement
In both monocot and dicot roots, the vascular bundles are arranged in a radial pattern. This means that the vascular tissues (xylem and phloem) are arranged in a circle around the center of the root. Therefore, this characteristic does not differentiate monocot roots from dicot roots.

### Step 3: Analyze the Pith Development
One of the key differences between monocot and dicot roots is the development of the pith. In monocot roots, the pith is typically well-developed and large. In contrast, dicot roots have a smaller or less developed pith. This is a significant distinguishing feature.

### Step 4: Consider Other Characteristics
- **Conjunctive Tissue**: The presence of conjunctive tissue between xylem and phloem is similar in both monocot and dicot roots.
- **Endodermis**: The endodermis is usually single-layered in both types of roots, which is another similarity.

### Conclusion
Based on the analysis, the primary character in which monocot roots differ from dicot roots is the size and development of the pith. Monocots have a large, well-developed pith, while dicots have a smaller, less developed pith.

### Final Answer
The correct answer is: **Large pith**.

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