Here's why:
* Cell plate formation: In plant cells, cytokinesis involves the formation of a cell plate, a new cell wall that divides the parent cell into two daughter cells.
* Vesicle fusion: The cell plate is formed from Golgi-derived vesicles that migrate to the center of the parent cell and fuse together.
* Cell wall material: These vesicles carry cell wall material, which is deposited at the site of fusion, eventually forming the complete cell plate.
* Timing: The formation of the cell plate requires the completion of nuclear division to ensure that each daughter cell receives a complete set of chromosomes.
Therefore, cytokinesis in plant cells is a distinct process that happens *after* the nucleus has divided and the chromosomes have been properly distributed to the daughter cells.
