DENDROLOGY

Detailed explanation-1: -Mammals are a group of vertebrate animals. Examples of mammals include rats, cats, dogs, deer, monkeys, apes, bats, whales, dolphins, and humans.

Detailed explanation-2: -Bears are carnivoran mammals of the family Ursidae (/ˈɜːrsɪdiː, -daɪ/). They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats throughout the Northern Hemisphere and partially in the Southern Hemisphere.

Detailed explanation-3: -They belong to the mammal class. Why? Because they are covered in hair, they have a spine, they’re warm-blooded and they feed milk to their babies once they are born. Many people often think of bears as big, ferocious creatures that are brown, black or white.

Detailed explanation-4: -History of Bear The polar bear (Thalarctos maritimus ) is the most recent, having evolved from the brown bear (Ursus arctos ) about 70, 000 years ago. The cave bear that is scientifically known as Ursus spelaeus, a massive mammal that co-existed with humans as late as 20, 000 years ago, was the most recent extinction.