The length of different internodes in a culm of sugarcane is variable because

Options

A. Position of axillary buds
B. Size of leaf lamina at the node below each internode
C. Intercalary meristem
D. Shoot apical meristem

Answer

### Step-by-Step Solution:

1. **Understanding Internodes**: Internodes are the segments of the stem between two nodes. In sugarcane, the length of these internodes can vary significantly.

2. **Types of Meristematic Tissue**: There are three types of meristematic tissues in plants:
- **Apical Meristem**: Located at the tips of roots and shoots, responsible for vertical growth.
- **Lateral Meristem**: Found along the sides of stems and roots, contributing to the thickness or girth of the plant.
- **Intercalary Meristem**: Located at the base of the internodes, responsible for the growth of internodes.

3. **Role of Intercalary Meristem**: In sugarcane, the intercalary meristem plays a crucial role in the elongation of the internodes. This meristematic tissue allows for the growth of the stem between the nodes, leading to variability in internode length.

4. **Conclusion**: The variability in the length of different internodes in a culm of sugarcane is primarily due to the presence and activity of the intercalary meristem, which facilitates the growth of these segments.

### Final Answer:
The length of different internodes in a culm of sugarcane is variable because of the presence of intercalary meristematic tissue, which is responsible for the growth and elongation of the internodes.

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