Yes, there are polar bears in Alaska.
A polar bear would need to adjust a lot of things in order to survive in a desert. Without air conditioning, or millions of years to evolve, a polar bear would likely die in the new environment.
The polar bear would because as the polar bear is the biggest land predator on earth
a polar bear will most likely win in a fight against a grizzly bear
A polar bear no doubt, its more as 10 times as heavy. it could easily take the wolf down to the ground and bite to death. Polar bear wins. the only animal that could challange a polar bear on land is a Siberian tiger
The polar bear would try to claw and bite the hippo down, but the hippo has thick skin and muscles for protection against teeth and claws. The hippo also has a larger jaw size and a larger size that could defeat the polar bear. If a polar bear fought with a hippo, the hippo would most likely get the polar bear at the end.
It is highly likely that the elephant would win the fight. Elephants have thick, defensive hide and tons of muscles to protect itself from claws and teeth, which would make it not get injured by the polar bear. The strong muscles of the elephant's head is good enough to kill the polar bear whenever it hits the polar bear. If the elephant has sharp tusks, it would definitely win by goring the polar bear to death. A cow elephant or a bull elephant can crush a polar bear to death.
Polar bear.
polar bear
Polar bear. Alaska.
It is highly likely that the elephant would win the fight. Elephants have thick, defensive hide and tons of muscles to protect itself from claws and teeth, which would make it not get injured by the polar bear. The strong muscles of the elephant's head is good enough to kill the polar bear whenever it hits the polar bear. If the elephant has sharp tusks, it would definitely win by goring the polar bear to death. A cow elephant or a bull elephant can crush a polar bear to death.
It is highly unlike that a polar bear would even get a chance to kill a moose because these animals live in two entirely different biomes. You would not see a polar bear in the boreal or transition-boreal forests, nor would you find a moose in the arctic near the coastline. For that reason, no a polar bear would not nor could not kill a moose. However, as far as human-ability to be very imaginative, it is likely that a polar bear could kill a moose.