In an onion (a plant cell), how is cytokinesis completed at the end of cell division?

1. Cytokinesis divides the cytoplasm into two daughter cells. 2. In animal cells a notch forms at the equator and deepens. 3. But in plant cells, instead of a notch, a cell plate forms along the midline. 4. An onion is a plant, so the cell-plate option applies; the deepening notch is ruled out as that is the animal-cell method. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 2 "Life Processes in Living Organisms Part 1", p.28_