Monocot root differs from dicot root in having

Options

A. Polyarch xylem bundles
B. Large and well developed pith
C. Both
D. Radial vascular Bundle and exarch xylem

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of Roots**:
- Roots can be classified into two main types: monocot roots and dicot roots. The differences between these two types are primarily based on their vascular bundles and other structural characteristics.

2. **Vascular Bundles**:
- Monocot roots typically have a higher number of xylem bundles compared to dicot roots. Specifically, monocot roots have more than 6 xylem bundles, which is referred to as polyarc xylem. In contrast, dicot roots usually have 2 to 4 xylem bundles.

3. **Pith Development**:
- The pith in monocot roots is usually large and well-developed, whereas in dicot roots, the pith is smaller and less developed. This is another distinguishing feature between the two root types.

4. **Arrangement of Vascular Bundles**:
- In monocot roots, the vascular bundles are arranged radially, meaning that the xylem and phloem are situated at different radii from the center. Additionally, monocot roots exhibit exarch xylem, where the protoxylem is located towards the periphery of the root, while the metaxylem is positioned towards the center.

5. **Summary of Differences**:
- To summarize, monocot roots differ from dicot roots in having:
- More than 6 xylem bundles (polyarc xylem).
- A large and well-developed pith.
- Radial arrangement of vascular bundles with exarch xylem.