Functional part of pollen tube is separated from the rest by

Options

A. Vacuoles
B. Callose plugs
C. Septa
D. Both B and C.

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Pollen Tube:**
- The pollen tube is a structure that forms after pollen grains germinate. It facilitates the transport of sperm cells to the ovule for fertilization.

2. **Identifying the Functional Part:**
- The functional part of the pollen tube is the tip, which is responsible for growth and nutrient uptake. This part is vital for the successful delivery of sperm cells.

3. **Role of Callose:**
- Callose is a polysaccharide, specifically a beta-1,3-glucan. It is a major component of the cell wall of the pollen tube.

4. **Formation of Callose Plugs:**
- Within the cytoplasm of the pollen tube, callose is deposited, forming structures known as callose plugs. These plugs are crucial in differentiating the functional part of the pollen tube from the rest of the structure.

5. **Separation of Functional Part:**
- The callose plugs effectively separate the living, functional, and growing parts of the pollen tube from the degenerative parts. This ensures that the active part of the pollen tube can function efficiently.

6. **Conclusion:**
- Therefore, the functional part of the pollen tube is separated from the rest by callose plugs.

**Final Answer:**
The functional part of the pollen tube is separated from the rest by callose plugs.

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