The intercalary meristerms are intact portions of

Options

A. Lateral meristems
B. Secondary meristems
C. Apical meristems
D. Permanent tissues that become meristematic

Answer

To solve the question regarding the intact portions of intercalary meristems, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Meristems**: Begin by defining what meristems are. Meristems are regions in plants where cells are actively dividing, leading to growth. They are classified into different types based on their location and function.

2. **Types of Meristems**: Identify the types of meristems mentioned in the question:
- **Apical Meristem**: Located at the tips of roots and shoots, responsible for primary growth.
- **Lateral Meristem**: Found along the sides of stems and roots, responsible for secondary growth (increasing girth).
- **Intercalary Meristem**: Located at the base of leaves and nodes, allowing for growth in length in certain plants, especially grasses.
- **Secondary Meristem**: Derived from permanent tissues that can revert to meristematic activity.

3. **Analyzing the Options**: The question asks which type of meristem intercalary meristems are intact portions of:
- **Option 1: Lateral Meristem**: This is the correct answer, as intercalary meristems are indeed intact portions of lateral meristems.
- **Option 2: Secondary Meristem**: This is incorrect, as secondary meristems arise from permanent tissues and are not intact portions of intercalary meristems.
- **Option 3: Apical Meristem**: This is also incorrect, as apical meristems are located at the tips and are not related to intercalary meristems.
- **Option 4: Permanent Tissue that becomes Meristematic**: This is incorrect as well; while permanent tissues can become meristematic, they do not directly relate to intercalary meristems.

4. **Conclusion**: Based on the analysis, the intercalary meristems are intact portions of lateral meristems, making the first option the correct answer.

### Final Answer:
The intercalary meristems are intact portions of **lateral meristem**.

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