How are they adapted to a cold and wet environment as the Arctic?
Polar bears are marvelously adapted to their arctic surroundings. Their thick winter coats, with glossy guard hairs and dense under-fur, and the thick layer of fat beneath their skin protect them against the cold. The guard hairs also shed water easily, so that after a swim the polar bear can shake itself like a dog to decrease chilling and to dry itself fairly quickly. Being large also helps keep warm. The white color of the polar bear also serves as camouflage. Polar bears are clever in their use of cover, be it land, water, or ice. This aids both their hunting of seals and their own escape from human hunters. The soles of the bears’ feet have small bumps and cavities that act like suction cups which help to keep them from slipping on the ice. Probably the most significant adaptation of polar bears to the uncertainties of food availability in the Arctic is their ability to slow down their metabolism (in order to conserve energy) after 7-10 days of not being able to feed, for whatever
