Intercalary meristem occurs mainly in

Options

A. Some dicot leaves
B. Some monocot stems
C. In all monocot stems
D. Dicot stem and roots

Answer

### Step-by-Step Solution:

1. **Understanding Intercalary Meristem**:
- Intercalary meristem is a type of meristematic tissue that is responsible for the growth in length of certain plant parts, particularly internodes and the bases of leaves.

2. **Function of Intercalary Meristem**:
- The primary function of intercalary meristem is to facilitate the elongation of the internodes, which contributes to the overall height of the plant.

3. **Location of Intercalary Meristem**:
- Intercalary meristems are predominantly found in monocotyledons (monocots). They are specifically located at the internodes and at the base of leaves.

4. **Exclusion of Other Options**:
- The options provided include:
- Some dicot leaves (incorrect, as intercalary meristems are not found in dicots).
- Some monocot stems (incorrect, as they are present in all monocots).
- All monocot stems (correct, as intercalary meristems are found in all monocots).
- Dicot stems and roots (incorrect, as intercalary meristems are absent in dicots).
- Based on this analysis, the only correct option is that intercalary meristem occurs in all monocot stems.

5. **Final Answer**:
- Intercalary meristem occurs mainly in **all monocot stems**.