In prokaryotes the cell envelope includes
Glycocalyx
Cell wall
Cell membrane
All the above

Options

A. Glycocalyx
B. Cell wall
C. Cell membrane
D. All the above

Answer

To solve the question regarding the components of the cell envelope in prokaryotes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Cell Envelope**:
- The cell envelope in prokaryotes refers to the outermost layers that surround the cell and provide protection and structure.

2. **Identify the Components of the Cell Envelope**:
- The cell envelope is composed of three main structures:
- **Glycocalyx**: This is the outermost layer that can be a capsule or slime layer, providing protection and aiding in adherence.
- **Cell Wall**: Located beneath the glycocalyx, the cell wall provides rigidity and shape to the cell.
- **Cell Membrane (Plasma Membrane)**: This is the innermost layer that controls the movement of substances in and out of the cell.

3. **Analyze the Options Given**:
- The options provided are:
- Glycocalyx
- Cell wall
- Cell membrane
- All the above
- Since we have identified that the cell envelope includes all three components, we can conclude that the correct answer must encompass all of them.

4. **Conclusion**:
- Since the cell envelope consists of glycocalyx, cell wall, and cell membrane, the correct answer is **All the above**.

### Final Answer:
- The answer to the question is **All the above**.