A monocot root differs from dicot root in which of the following?

Options

A. Presence of more than 6 xylem bundles
B. Absence of secondary growth
C. Presence of well-developed pith
D. All of these

Answer

To answer the question about how a monocot root differs from a dicot root, we can break down the key differences step by step:

### Step-by-Step Solution:

1. **Xylem Structure**:
- **Monocot Roots**: Typically have more than 6 xylem vessels arranged in a circular pattern.
- **Dicot Roots**: Generally have 4 xylem vessels arranged in a star-shaped pattern.

2. **Secondary Growth**:
- **Monocot Roots**: Do not exhibit secondary growth. This means they do not produce secondary xylem or phloem, which is common in dicots.
- **Dicot Roots**: Show secondary growth, allowing them to increase in thickness over time due to the formation of secondary xylem and phloem.

3. **Presence of Pith**:
- **Monocot Roots**: Have a well-developed pith, which is a central part of the root.
- **Dicot Roots**: Lack a well-defined pith; instead, they have a more solid core made up of vascular tissues.

4. **Conclusion**:
- Based on the differences highlighted, we can conclude that monocot roots differ from dicot roots in the number of xylem vessels, the presence or absence of secondary growth, and the presence of pith.

### Final Answer:
All of the above differences (more than 6 xylem vessels, absence of secondary growth, and presence of well-developed pith) are characteristics that distinguish monocot roots from dicot roots.