Phragmoplast is related to

Options

A. division of nucleolus
B. cell elongation
C. Cytokinesis
D. assemblage of chromonomes at metaphase.

Explanation

### Step-by-Step Solution:

1. **Understanding Phragmoplast**:
- Phragmoplast is a structure that forms during the process of cytokinesis in plant cells. It is composed of microtubules and is crucial for the division of the cytoplasm.

2. **Cytokinesis in Plant Cells**:
- Cytokinesis is the final step of cell division where the cytoplasm of a parental cell is divided into two daughter cells. In plant cells, this process is distinct from that in animal cells.

3. **Formation of Phragmoplast**:
- During cytokinesis in plant cells, the Golgi apparatus organizes itself at the equatorial plane of the cell. Microtubules form the phragmoplast, which serves as a scaffold for the formation of the new cell wall.

4. **Cell Plate Formation**:
- The phragmoplast aids in the formation of the cell plate. Vesicles containing cell wall materials, such as cellulose, hemicellulose, and pectin, move along the microtubules of the phragmoplast and fuse at the center of the cell, contributing to the formation of the cell plate.

5. **Completion of Cytokinesis**:
- As the cell plate expands outward, it eventually fuses with the existing cell wall, leading to the separation of the two daughter cells. The phragmoplast then disappears after the cell plate has formed.

6. **Conclusion**:
- Therefore, the phragmoplast is specifically related to the process of cytokinesis in plant cells.

### Final Answer:
Phragmoplast is related to **cytokinesis** in plant cells.

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