Which phases encompasses all of the stages of mitosis but no other events?

The question is incomplete.

However, I can notice that it is mainly dealing with

“the phases of cell division that encompasses all of the stages of mitosis and no other events”

The answerer tackled that part, providing explanation to the point you focused on.

Explanation:

Cell division involves cell multiplication. In essence, one cell divide in two, two in four and so on. TWO types of cell division exists: Mitosis and Meiosis.

Mitosis is a cell division in which the daughter cells have the same number of chromosomes as the parent cell. It produces diploid cells.

The stages of mitosis are: Interphase, Prophase, Metaphase, Anaphase and Telophase.

Meiosis, on the other hand, is a two successive cell division with duplication of chromosomes. It produces haploid cells.

It consists of two successive divisions:

I) 1st meiotic division: a parent cell splits into two

II) 2nd meiotic division: two parents cells splits again giving a total of four daughter cells. It has the following phases: prophase II, metaplase II, Anaphase II and Telophase II

Note that the 2nd meiotic division is similar to mitosis in terms of behaviour of chromosomes

your answer is "the 1950's"