All marsupials have a pouch. All monotremes are egg laying mammals. Placental mammals give birth to live young, but do not have a pouch. Bears do not have a pouch, and they give birth to live young rather than laying eggs, so they are placental mammals.
A grizzly bear is larger and more powerful than a koala which, incidentally, is not a bear at all, but a marsupial. A grizzly bear could easily defeat a koala, and kill it with a single swipe of its paw. However, being smaller, a koala would be capable of climbing higher up a tree, into the smaller branches, which would be unable to support a grizzly bear. In doing do, the koala could defeat any grizzly bear's intentions.
Grizzly bear
A Grizzly Bear is big but, if you measure them side by side, the Polar Bear is seven inches taller than the Grizzly Bear.
Grizzly bear is not poisonous.
A koala, which has no relation at all to the bear family, is a marsupial, that is, a pouched mammal.
It's the grizzly bear
Grizzly bear, by far.
it's name is the brown bear, grizzly bear and teddy bear are nicknames for it.
A certain type of bear is called a grizzly bear.
No, they do not eat dead grizzlies.
The colors of a grizzly bear are black and/or brown.
The grizzly or brown bear and the polar bear are basicly the same size.