Whereas bacteria only have a single chromosome, eukaryotic species have at least one pair of chromosomes. Most have more than one pair. Another relevant point is that eukaryotic chromosomes are detected only occur during cell division and not during all stages of the cell cycle.
How does it work? In very basic terms, your absorption RV refrigerator works like this. It uses heat, and a combination of ammonia, hydrogen gas, and water. These chemicals react and go through various tubes, and the evaporation and condensation process of these chemicals are what cools the refrigerator. These are basic laws of physics.
How to Diagnose RV Refrigerator Problems. First, make sure the unit is level. Then determine if it is working at all, or is completely non-functional. This is best done with a thermometer, although in a pinch you can usually tell by placing your bare hand against the cooling coils inside the main food compartment and freezer.