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 the options provided and identify the correct answer step by step.

### Step 1: Understand the Middle Lamella
The middle lamella is a layer that exists between the cell walls of adjacent plant cells. It is primarily composed of pectin and serves as a glue that holds the cells together.

**Hint:** The middle lamella is crucial for cell adhesion in plants.

### Step 2: Analyze the Options
1. **Primary Ball Junction**: This structure is involved in cell adhesion but does not connect the cytoplasm of neighboring cells. It primarily provides protection and structural integrity.

**Hint:** Think about whether this option relates to cytoplasmic connections.

2. **Plasmodesmata**: These are specialized channels that traverse the middle lamella and connect the cytoplasm of adjacent plant cells. They allow for communication and transport of substances between cells.

**Hint:** Look for a term that indicates a connection between cytoplasm in plant cells.

3. **Desmosomes**: While desmosomes are involved in cell-to-cell adhesion, they are more relevant to animal cells and do not traverse the middle lamella or connect cytoplasm directly.

**Hint:** Consider the type of cells (plant vs. animal) when evaluating this option.

4. **Secondary Wall**: This is a structural component of plant cells that provides additional support but does not connect cytoplasm between cells.

**Hint:** Secondary walls are not involved in cell communication.

### Step 3: Identify the Correct Answer
After analyzing all the options, the correct answer is **Plasmodesmata**. These structures specifically connect the cytoplasm of neighboring plant cells and traverse the middle lamella, facilitating direct communication and transport of materials.

**Final Answer:** Plasmodesmata