Healing of wound in plants takes place by the activity of

Options

A. intercalary meristem
B. secondary meristem
C. mass meristem
D. apical meristem

Answer

**Step-by-step Solution:**

1. **Understanding the Question**: The question asks about the process of healing wounds in plants and which type of meristematic tissue is responsible for this healing.

2. **Identifying Meristematic Tissues**: There are several types of meristematic tissues in plants, including:
- Intercalary meristem
- Secondary meristem
- Mass meristem
- Apical meristem

3. **Role of Meristematic Tissues**:
- **Intercalary Meristem**: This tissue is primarily responsible for the elongation of internodes and increases the height of the plant.
- **Secondary Meristem**: This tissue contributes to the increase in girth or thickness of the plant, such as in tree trunks.
- **Apical Meristem**: This tissue is located at the tips of roots and shoots and is responsible for the vertical growth of the plant.
- **Mass Meristem**: This tissue can form a mass of undifferentiated cells, which can develop into various types of cells.

4. **Healing Process**: When a plant experiences a wound, neighboring cells can undergo a process called de-differentiation. This means that specialized cells revert to a more primitive, undifferentiated state, allowing them to proliferate and form a mass of cells known as callus.

5. **Conclusion**: Among the given options, the type of meristematic tissue that can form a mass of undifferentiated cells (callus) to heal the wound is the **mass meristem**.

6. **Final Answer**: Therefore, the correct answer to the question is **mass meristem**.

---