If cells come from other cells, then why aren't they all in the same phase

1) interphase

The majority of cells were in the stage interphase. In interphase, the cell gets itself ready for Mitosis or Meiosis.

2)The cell types in a multicellular organism become different from one another because they synthesize and accumulate different sets of RNA and protein molecules. They generally do this without altering the sequence of their DNA.

Explanation:

I am sure you can come up with your own hypothesis :)  These Are NOT my words.  BUT I HOPE THIS HELPS!

i would think a oil tanker that has leaked in a bay