Well, when a plant or animal dies in a damp environment it will most likely get buried in mud or silt. The tissues over time will decompose and leave bones or shells behind ( depending on what was there originally it can vary) Eventually over time sediment builds up and hardens into rock.
I sincerely hope this helps you ~
A beacause not everything happens to all cells
the worker ants lay eggs without mating but the worker ants dont have sperm cells tho
An animal cell has a nucleus but no cell wall.