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.
1 Establish the correct temperature in the freezer by placing a thermometer between frozen food packages. 2  Wait 5 to 8 hours. 3  If the temperature is not 0-2Â°F, adjust the freezer temperature control. 4  Check again after 5-8 hours. Establish the correct refrigerator temperature by placing a thermometer in a glass of water in the middle of the refrigerator. 2  Wait 5 to 8 hours. 3  If the temperature is not 38-40Â°F, adjust the temperature control. 4  Check again after 5-8 hours.