Which plant has been used to study cytoplasmic streaming?

Options

A. Spirulina
B. Hydrilla
C. Chlorella
D. Eichhornia

Answer

To solve the question "Which plant has been used to study cytoplasmic streaming?" we can follow these steps:

### Step 1: Understand Cytoplasmic Streaming
Cytoplasmic streaming, also known as protoplasmic streaming, refers to the movement of the cytoplasm within a cell. This movement facilitates the distribution of nutrients, organelles, and other cellular components throughout the cell. It occurs in both plant and animal cells.

**Hint:** Remember that cytoplasmic streaming is essential for cellular functions and can be observed in various organisms.

### Step 2: Analyze the Options
The options provided are:
- Spirulina
- Hydrilla
- Chlorella
- Acornia

We need to determine which of these plants has been specifically used to study cytoplasmic streaming.

**Hint:** Consider the characteristics of each plant and their relevance to cytoplasmic streaming.

### Step 3: Identify the Correct Plant
Among the options, Hydrilla is known for its observable cytoplasmic streaming, particularly the movement of chloroplasts within its cells. This movement can be observed under light conditions, making Hydrilla a suitable candidate for studying cytoplasmic streaming.

**Hint:** Look for plants that are commonly used in laboratory studies for cellular processes.

### Step 4: Conclusion
Based on the analysis, the plant that has been used to study cytoplasmic streaming is **Hydrilla**.

**Final Answer:** The correct answer is **Hydrilla (Option B)**.