Which one forms the pollen tube

Options

A. Prothallia cell
B. Vegatative cell
C. Generative cell
D. Stalk cell.

Answer

To solve the question "Which one forms the pollen tube?", let's break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Pollen Structure**:
- Pollen grains consist of two main types of cells: the vegetative cell and the generative cell.

2. **Pollen Germination**:
- When pollen grains land on the stigma of a flower, they germinate. This process involves the growth of a structure known as the pollen tube.

3. **Formation of the Pollen Tube**:
- The pollen tube is specifically formed from the vegetative cell of the pollen grain. This cell is responsible for the growth and elongation of the pollen tube which travels down the style to reach the ovule.

4. **Role of the Generative Cell**:
- The generative cell, on the other hand, does not form the pollen tube. Instead, it divides to produce two male gametes that participate in fertilization.

5. **Elimination of Incorrect Options**:
- Option A (prothalia cell) is incorrect as it does not relate to pollen tube formation.
- Option C (generative cell) is incorrect because it does not form the pollen tube; it produces gametes.
- Option D (stalk cell) is also incorrect as it is not involved in the formation of the pollen tube.

6. **Conclusion**:
- The correct answer is Option B, the vegetative cell, as it is responsible for forming the pollen tube.

### Final Answer:
**The vegetative cell forms the pollen tube.**

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