Crossing over. Parts of sister chromatids will sometimes switch places with the parallel part, resulting in a completely unique DNA sequence.
Normally, oxygen from the blood cells supply your muscles with the energy it needs to carry out certain actions. However, when there isn't enough oxygen to support the muscles, it produces lactic acid, or fermentation, to make up for the oxygen. (That's why you get that burn-y feeling whenever you exercise!)
DNA stores the instructions (genetic information) used to build proteins.
I believe c if not i’m sorry
The colony would have less genetic variation. The Bacteria in the colony would be too genetically similar