they eat more,can swim better,and they are heavyer.
Adult male bears.
Adult black bears do not have any predators.
The only variances in "look" between Polar Bears and Adult Polar Bears would be based on the gender and age of the bear(s).
man and other bears are about all an adult bear has to worry about.
Only man and larger bears would attack an adult.
Same way other bears grow.
seals
polar bears are not like regular bears because adult male polar bears weighs around 350 to 680kg and other regular male bears are different from that.
yes, they are smaller and have not as much hair ;)
Adult black bears do not have any predators.
adult polar bears are 7 feet long and cubs are 3 feet long
they die.