During the formation of the primary plant body, specific regions o fthe … produce dermal tissues , ground tissues and vascular tissues.
Find the appropriate missing word

Options

A. Apical meristem
B. Intercalary meristem
C. Secondary meristem
D. Primary meristem

Explanation

To solve the question regarding the formation of the primary plant body and the specific regions that produce dermal tissues, ground tissues, and vascular tissues, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Plant Tissues**:
- Plants have three main types of tissues: dermal, ground, and vascular tissues.
- Dermal tissue covers the outer surface, ground tissue makes up the bulk of the plant, and vascular tissue is responsible for the transport of nutrients and water.

2. **Identifying the Role of Meristems**:
- Meristems are regions of undifferentiated cells in plants that can divide and differentiate into various types of tissues.
- There are different types of meristems, including apical, intercalary, and secondary meristems.

3. **Types of Meristems**:
- **Apical Meristem**: Located at the tips of roots and shoots, responsible for primary growth and the formation of new tissues.
- **Intercalary Meristem**: Found at the base of leaves or internodes, contributing to the growth of the plant in length.
- **Secondary Meristem**: Involved in secondary growth, which increases the thickness of the plant.

4. **Determining the Correct Meristem**:
- Since the question specifically asks about the formation of dermal, ground, and vascular tissues during the primary growth of the plant body, we need to identify which meristem is responsible for this.
- The apical meristem is responsible for the primary growth of the plant and gives rise to the primary plant body, including all three types of tissues mentioned.

5. **Conclusion**:
- The appropriate missing word that fits the context of the question is "apical meristem."

### Final Answer:
The missing word is **apical meristem**.