The cell cycle begins when a cell is and ends when it

The cell cycle is the period of time from the beginning of one cell division to the beginning of the next.

The cell cycle is the series of biological events which cells go through as they grow and divide. The cell cycle has two phases.

(i)                  Mitosis

(ii)                Interphase.

Interphase is broken down to G1 which is growth phase, S which is Dna synthesis phase and G2 which is growth phase again. In Mitosis it consists of anaphase, telophase, prophase, and metaphase.

The cell cycle begins in cytokinesis and ends in Mitosis. Mitosis cannot start before interphase ends because mitosis requires a lot of energy and nutrients to go through the process.Since interphase is the beginning of G1,Dna synthesis and G2 comes to play, it helps to create nutrients and energy.

Let’s have an example of a menstrual cycle. You bleed at the beginning of a cycle not at the end. The first day of your period is the menstrual cycle.

your answer is "the 1950's"