Final answer:
The cells in the plant ovary are in the cytokinesis stage of cell division, indicated by the two nuclei and the formation of a new cell wall which separates the two daughter cells.
Step-by-step explanation:
The dividing cells of the plant ovary with two nuclei are likely entering cytokinesis, as evidenced by the formation of a cell wall or cell plate. During the mitosis phase of cell division, the cell's genetic material is divided equally between two daughter nuclei. After this, cytokinesis begins, during which the cytoplasm is divided and a new cell wall starts to form in plant cells, separating the two new cells.
In plant cells, unlike in animal cells which use a cleavage furrow, a cell plate forms where the metaphase plate once was, and this cell plate eventually develops into a separating cell wall. Thus, the presence of two nuclei suggests that mitosis has been completed and the process of cytokinesis is underway, leading to the formation of two genetically identical daughter cells with their own nuclei and cell walls.