Secondary meristems are derived from

Options

A. Promeristem
B. Primary meristem
C. primary permanent tissue
D. Lateral meristem

Answer

**Step-by-Step Solution:**

1. **Understanding Secondary Meristems**:
- Secondary meristems are tissues in plants that contribute to secondary growth, which increases the girth or thickness of the plant.

2. **Identifying Sources of Secondary Meristems**:
- To determine where secondary meristems are derived from, we need to analyze the options provided.

3. **Evaluating the First Option - Pro Meristem**:
- Pro meristem refers to primary meristem cells that are actively dividing. These cells are primarily responsible for primary growth, not secondary growth. Therefore, this option is incorrect.

4. **Evaluating the Second Option - Primary Meristem**:
- Primary meristems are responsible for the initial growth of the plant, specifically in length. Like pro meristems, they do not contribute to secondary growth. Thus, this option is also incorrect.

5. **Evaluating the Third Option - Primary Permanent Tissue**:
- Primary permanent tissues are differentiated cells that have lost the ability to divide. They are derived from meristematic cells and are responsible for various functions in mature plants. Importantly, secondary meristems can arise from these tissues, making this option correct.

6. **Evaluating the Fourth Option - Lateral Meristem**:
- Lateral meristems are indeed a type of secondary meristem, but they are not the source from which secondary meristems are derived. Instead, they are a result of secondary growth. Therefore, this option is incorrect.

7. **Conclusion**:
- The correct answer is that secondary meristems are derived from primary permanent tissue.

**Final Answer**: Secondary meristems are derived from primary permanent tissue.

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