Final answer:
In plant cell cytokinesis, the cell plate forms midway between divided nuclei from the fusion of Golgi vesicles, leading to the division of the cytoplasm and the creation of two new cells. The correct answer is Cell plate.
Step-by-step explanation:
In plant cells, the structure that forms midway between the divided nuclei during cytokinesis is a cell plate. This process begins at the end of mitosis, when Golgi vesicles coalesce at the metaphase plate, creating a structure known as a phragmoplast. As the Golgi vesicles fuse together, they form the cell plate, which grows outward toward the cell walls.
Once the cell plate reaches the walls, it facilitates the division of the cytoplasm and the formation of two separate plant cells.
The membranes of these Golgi vesicles then fuse to form a plasma membrane, which, along with the cell wall, creates the separation between the two newly formed daughter cells. Thus, the correct option is C) Cell plate.