Yes.
Possibly, I know that if a bear does not eat enough it can wake up from its hibernation to eat.
Usually during hibernation.
tappen
When bumblebees wake up from hibernation they usually reproduce.
tappen
No, they do not defecate while hibernating.
No, the whole metabolism shuts down to almost nothing.
Justin bieber
The fat cells provide nutrition to the bear while in hibernation. They try to gain as much weight as possible so they will go into hibernation with plenty of fat cells. They come out of hibernation with less weight and are ravenously hungry when they wake up.
Yes, they do hibernate, but it can be prevented by keeping the tank at around 25C and spraying with warm water.
In the winter bears go through hibernation. The bear was hungry and ill-tempered after it's long hibernation.
Bears can lose up to 30% of their body weight during hibernation due to reduced food intake and metabolic rate.