Answer:
Well I believe mitosis is the reproduction of 2 cells, while meiosis is 4 cells
Explanation:
heat (metal or glass) and allow it to cool slowly, in order to remove internal stresses and toughen it.
OR
recombine (DNA) in the double-stranded form following separation by heat.
I would say the growth, the repair, and the reproduction.
The oldest layers are on the bottom thats why they are the oldest. Super position is what it is called if thats what your asking.