The epidermal growth factor promotes cell division. Hence, in the absence of the growth factor, a cell is unlikely to continually go through all the cell cycle phases.
Cells usually follow some sets of instructions before passing through key stages in the cell cycle. These stages are known as checkpoints. Unless everything is fine at these points, cells will perpetually be stuck in whatever phases of the cycle they are in.
Cells undergo growth and development at the G1 phase of the cell cycle. If these growth and development are promoted by the so-called growth factor according to the illustration, the absence of it would mean that such a cell cannot proceed to the next phase of the cell cycle, which is the S phase. In other words, the cell will be stuck in G1 phase.
More on checkpoints of the cell cycle can be found here: https://brainly.com/question/2128300
