A structure that is traversing the middle lamella and connecting the cytoplasm of neighbouring cells is called

Options

A. Primary wall junction
B. Plasmodesmata
C. Desmosomes
D. Secondary wall

Answer

To solve the question, "A structure that is traversing the middle lamella and connecting the cytoplasm of neighbouring cells is called," we will analyze each option provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks for a specific structure that connects the cytoplasm of neighboring cells and traverses the middle lamella. The middle lamella is a layer that exists between the cell walls of adjacent plant cells.

2. **Analyzing the Options**:
- **Option 1: Primary wall junction**:
- The primary wall is a structure that provides support and protection to the cell but does not specifically connect the cytoplasm of neighboring cells. Therefore, this option is incorrect.

- **Option 2: Plasmodesmata**:
- Plasmodesmata are microscopic channels that traverse the cell walls of plant cells and connect the cytoplasm of adjacent cells. This allows for the transport of materials and communication between cells. This option fits the description given in the question, making it the correct answer.

- **Option 3: Desmosomes**:
- Desmosomes are structures that provide adhesion between cells, particularly in animal tissues. They do not connect the cytoplasm of neighboring cells and are not found in plant cells. Thus, this option is incorrect.

- **Option 4: Secondary wall**:
- The secondary wall is a thickened layer found inside the primary wall of some plant cells, providing additional strength. It does not connect neighboring cells' cytoplasm, making this option incorrect as well.

3. **Conclusion**:
- After analyzing all the options, the only structure that fits the criteria of traversing the middle lamella and connecting the cytoplasm of neighboring cells is **Plasmodesmata**. Thus, the correct answer is **Option 2: Plasmodesmata**.

### Final Answer:
**Plasmodesmata**