Final answer:
The cell membranes of hibernating animals are expected to contain a higher proportion of unsaturated fatty acids and possibly more cholesterol to maintain membrane fluidity during the low temperatures of hibernation.
Step-by-step explanation:
The lipid composition in the cell membranes of hibernating animals would be expected to comprise a higher proportion of unsaturated fatty acids. These unsaturated fats maintain the fluidity of membranes even at lower temperatures, which is crucial for keeping the membranes functional during hibernation when body temperatures drop. Additionally, some hibernating animals may have an increased amount of cholesterol in their cell membranes, which acts similar to an antifreeze, further helping to maintain membrane fluidity in cold environments.