Final answer:
During plant cell cytokinesis, a cell plate forms to separate the cytoplasm and create new cell walls for the daughter cells. This process is facilitated by Golgi vesicles that fuse at the metaphase plate.
Step-by-step explanation:
The structure that forms in between a plant cell to separate its cytoplasm during cytokinesis is known as the cell plate. During the final stage of cell division, referred to as cytokinesis, plant cells require the formation of a new cell wall between the two daughter cells. Since plants have rigid cell walls, they cannot form a cleavage furrow like animal cells. Instead, Golgi vesicles accumulate and disperse throughout the dividing cell during interphase. In telophase, these vesicles move along microtubules to the metaphase plate, where they coalesce and fuse to form the cell plate. As more vesicles fuse, the cell plate grows outward until it integrates with the existing cell walls, ultimately leading to the formation of separate plasma membranes and new cell walls for the daughter cells.