variation. divergence among individual animals of a group. The differences in the morphology or function of an organ or organism, are small enough to stay within the variability of the type organism or organ.
According to the Food and Drug Administration, your fridge should be set at or below 40 F (4 C). Your freezer should be set at 0 F (-18 C). Food stored in the freezer at 0 F will remain safe indefinitely, although the quality will decrease the longer the food is in the freezer. Freezing does not change a food's nutritional value.
Measuring Temperature. A thermometer should be used to check the temperature of the freezer. The thermometer should be placed near the front of the freezer and checked at least once a week to assure that the freezer is maintaining the proper temperature.reezers should maintain a temperature of 0 F, or about -18 C. This temperature will stop the growth of bacteria but will not kill it.