Which one of the following structures between two adjacent cells is an effective transport pathway ?

Options

A. Plasmaiemma
B. plasmodesmata
C. plastoquinones
D. Endoplasmic reticulum

Answer

To solve the question "Which one of the following structures between two adjacent cells is an effective transport pathway?", we will analyze the given options step by step.

### Step 1: Understand the Question
The question asks for a structure that serves as a transport pathway between two adjacent cells. This means we are looking for a connection that allows for the movement of materials or communication between cells.

**Hint:** Focus on structures that connect cells and facilitate transport.

### Step 2: Analyze the Options
We have four options to consider:
1. **Plasma lemma**: This refers to the plasma membrane of a cell, which is not a structure that connects adjacent cells.

**Hint:** Think about whether this structure connects two cells or is part of a single cell.

2. **Plasmodesmata**: These are small channels that connect the cytoplasm of adjacent plant cells. They allow for the transport of materials and communication between cells.

**Hint:** Consider if this structure allows direct communication and transport between two cells.

3. **Plastoquinones**: These are molecules involved in the photosynthetic process, specifically in the electron transport chain, but they do not serve as a pathway between cells.

**Hint:** Determine if this option is a structural connection or a molecule involved in a process.

4. **Endoplasmic reticulum**: This is an organelle within a single cell and does not connect adjacent cells.

**Hint:** Remember that organelles are parts of a single cell, not structures between cells.

### Step 3: Identify the Correct Answer
From the analysis:
- The **plasma lemma** is not correct as it pertains to individual cells.
- **Plasmodesmata** is the correct answer as it directly connects adjacent plant cells and facilitates transport and communication.
- **Plastoquinones** and **endoplasmic reticulum** are also incorrect as they do not serve the function of connecting adjacent cells.

### Conclusion
The correct answer is **plasmodesmata**.

**Final Answer:** Plasmodesmata