What are three characteristics that make a polar bear a marine mammal?

Answer 1

Polar bears are not explicitly marine mammals. They are however rather aquatic. Polar bears have webbed paws, which are very broad and give the bears an impressive stroke. Their fur is waterproof. Polar bears are excellent swimmers and have been known to swim distances of 40 miles. They also obtain much of their diet from seals and other marine creatures.

A polar bear is a mammal because it feeds by its mother milk, they have white fur, they have a mammary glands, even they have sweat glands, they are warm-blooded. Polar bears are backbone known as vertebrates, or chordates. They have an internal skeleton is called an endoskeleton.

Answer 2

Mammals are a class of vertebrate animals characterized by the presence of sweat glands, including sweat glands modified for milk production, hair, three middle ear bones used in hearing, and a neocortex region in the brain. Almost all mammals give birth to live young instead of laying eggs. Most mammals also possess specialized teeth, and many use a placenta during gestation. The mammalian brain regulates endothermic and circulatory systems, including a four-chambered heart. All of these features of mammals are one in the same with polar bears.