Heat Tolerance: Desert environments are characterized by high temperatures, so a polar bear would need to develop mechanisms to tolerate and regulate its body temperature. This could involve changes in its fur, such as a lighter color or thinner coat, to reflect sunlight and reduce heat absorption.

Taking a look at a polar bear's premolars and molars in comparison to other types of Alaskan bears, you'll notice they are sharper and might have more resemblance to a serrated knife than the flat crushing molars and premolars of other bears.

The polar bear's footpads have a kind of “non-slip” surface, allowing them to get traction on slippery ice. Polar bears have strong legs and large, flattened feet with some webbing between their toes, which helps with swimming and walking on ice.