Final answer:
The reforming of nuclear envelopes and the formation of a cell plate are characteristic of the telophase stage of mitosis in plant cells. Telophase is the final stage of division where the nuclear envelope is reconstructed around daughter chromosomes and a cell plate is formed to ultimately create a dividing wall between the daughter cells.
Step-by-step explanation:
The reforming of nuclear envelopes around the daughter chromosomes, and the formation of a cell plate, are features that occur during the telophase stage of mitosis in plant cells. During this phase, as the chromosomes reach the opposite poles of the cell, two new daughter nuclei start to form. Simultaneously, the Golgi vesicles are transported on microtubules to form a phragmoplast at the metaphase plate. The vesicles then fuse and coalesce to form the cell plate, which ultimately becomes the new cell wall that separates the two daughter cells.
Furthermore, during telophase in plant cells, enzymes use the glucose that has accumulated between the membrane layers to build a new cell wall. This process along with the formation of new nuclear envelopes signals the end of mitosis and the beginning of cytokinesis, where the cytoplasm is divided into two distinct daughter cells. As a result, mitosis concludes with two genetically identical daughter cells, each with their own nuclear envelope surrounding a set of chromosomes.