Outer space / free space includes

Options

A. inter cellular spaces
B. Cell wall
C. apoplast
D. All

Answer

### Step-by-Step Solution:

1. **Understanding the Concept of Free Space**:
- Free space in the context of plant cells refers to areas that are not occupied by protoplasm. This includes the cell wall and intercellular spaces.

2. **Identifying Components of Free Space**:
- The cell wall is the outermost layer of a plant cell and is considered part of the free space.
- Intercellular spaces are the gaps between adjacent cells and are also included in the free space.

3. **Defining Epoplast**:
- The term "epoplast" refers to the continuum of cell walls and intercellular spaces that facilitate the movement of water and solutes. It does not include the cytoplasm or cytoplasmic streaming.

4. **Exclusion of Cytoplasmic Streaming**:
- Cytoplasmic streaming refers to the movement of the cytoplasm within a cell. It is not part of the epoplast and is therefore not included in the definition of free space.

5. **Conclusion**:
- Since the cell wall, intercellular spaces, and epoplast are all components of free space, the correct answer to the question is that all three are included in the definition of outer space or free space.

### Final Answer:
The outer space or free space includes the cell wall, intercellular spaces, and epoplast.

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