Polar bears have adapted to life in a harsh tundra climate, with the aid of physiological and behavioral adaptations. Bears have very thick fat and fur that keeps them warm in such cold weather and also enables them to swim in very cold water. The fur is white in color and helps them blend in with the surrounding ice. They have large claws and strong teeth to tear the skin and meat of their prey. A strong sense of smell helps them find food easily while alerting them to the presence of predators. They hibernate to save on energy requirements during the winter season and are capable of using the stored body fat as a source of energy during hibernation. Despite their body weight, they are good swimmers and divers and can swim through ice slabs (or pieces) floating in the water.
These coupled with behavioral adaptations enable their survival in a tundra environment.
Hope this helps.
Polar Bears display a myriad of physiological adaptations. While most animals have some sort of physiological adaptations, Polar Bears have more than usual. This is because their home, the tundra, is one of the harshest ecosystems to live in.
Polar Bears have thick fur and fat that allows them to stay warm in the cold weather and to even swim in the ice cold water. In addition to this their thick fur is white, which allows them to camouflage and blend into the ice they are surrounded by. This camouflage makes it significantly easier for Polar Bears to hunt and ambush their prey.
Polar Bears also have strong muscles and sharp claws and teeth. This enables them to be the top consumer in the tundra. The strong muscles are a crucial development for Polar Bears as it allows them to break the ice when seal hunting.