Select the incorrect w.r.t. cytoplasmic streaming.

Options

A. Symplastic movement may be aided by cytoplasmic streaming
B. Cytoplasmic streaming can be observed in cells of the Hydrilla leaf.
C. Over long distances, substances move by cytoplasmic streaming supplemented by passive transport.
D. Both (A) and (C )

Answer

To solve the question regarding the incorrect statement about cytoplasmic streaming, we will analyze each statement provided and determine which one is false.

### Step-by-Step Solution:

1. **Understanding Cytoplasmic Streaming**:
- Cytoplasmic streaming, also known as cyclosis, refers to the movement of the cytoplasm within a cell. This process allows for the distribution of nutrients, organelles, and other substances throughout the cell.

**Hint**: Remember that cytoplasmic streaming is an intracellular process, not a long-distance transport mechanism.

2. **Analyzing the First Statement**:
- The first statement claims that cytoplasmic streaming helps in symplastic movement.
- This is correct because symplastic movement involves the movement of substances through the interconnected cytoplasm of adjacent cells, which is facilitated by cytoplasmic streaming.

**Hint**: Symplastic movement is related to the movement of substances between cells through their cytoplasm.

3. **Analyzing the Second Statement**:
- The second statement states that cytoplasmic streaming can be observed in the leaf of Hydrilla.
- This is also correct, as cytoplasmic streaming can be observed in various plant cells, including those of Hydrilla when viewed under a microscope.

**Hint**: Think about practical examples where cytoplasmic streaming can be observed in plant cells.

4. **Analyzing the Third Statement**:
- The third statement claims that in long distances, substances can move through cytoplasmic streaming and passive transport.
- This statement is incorrect. Cytoplasmic streaming is limited to intracellular movement and cannot facilitate long-distance transport. Long-distance transport in plants is primarily carried out by vascular tissues such as xylem and phloem.

**Hint**: Consider the difference between intracellular movement (cytoplasmic streaming) and long-distance transport (vascular tissues).

5. **Conclusion**:
- Based on the analysis, the incorrect statement regarding cytoplasmic streaming is the third one, which suggests that it can facilitate long-distance transport.

### Final Answer:
The incorrect statement with respect to cytoplasmic streaming is: **"In long distances, substances can move through cytoplasmic streaming and passive transport."**