What is the period between two successive cell divisions called?

The fruit fly has $8$ chromosomes $(2n)$ in each cell. During interphase of mitosis,if the number of chromosomes at $G_1$ phase is $8$,what would be the number of chromosomes after $S$ phase?

How much time is required for a typical human cell to divide in a culture medium?

The interphase of mitosis in human cells typically lasts for how long (in $hours$)?

The interphase is often called the resting phase. In this phase:

Which phase of the interphase is known as the growth phase?