During which phase of mitosis does the nuclear envelope disappear?

What are the four phases that occur during the M phase of mitosis?

A cell in prophase could have which of the following characteristics?

During prophase of mitosis, how many replicated chromosomes are present in the original cell?

During which stage of mitosis do the centrioles move to the opposite poles of the cell?

Sister chromatids line up at the center of the cell during which phase of mitosis?

Which of the following events occurs during prophase?

Mitosis occurs in which layer of the epidermis?