Which of the following is not a part of mitosis?

The plate-like structure made of pectin formed in a plant cell during cytokinesis is called:

$A$ student observed a plant cell from a field in the telophase stage. He informed his teacher that the cell appeared different from other cells in telophase. The formation of the cell plate was not observed. Consequently,the cell contained a higher number of chromosomes compared to other dividing cells. This phenomenon results in $..........$.

If karyokinesis is not followed by cytokinesis,then it gives rise to:

Which event results in the formation of two cells from a single cell?

$(1)$ Definition / Explanation: Karyokinesis
$(2)$ Definition / Explanation: Cytokinesis