By this definition, bears don't hibernate, because their body temperature drops only slightly and they awake relatively easily. Not everyone accepts this narrow definition, however. For the purposes of this article, we'll use the term hibernation to describe any long-term reduction in body ...
Bear hibernation is part of a bear's annual cycle of activity, when its metabolic systems change and activity pauses for a period of time varying with the habitat's climate. Grizzly bears hibernate for 5–7 months each year. But it isn't as clear-cut as curling up and going to sleep ...
Bears hibernate throughout winter months. Bears do not eat, drink or defecate when they hibernate but that doesn’t mean they are in complete repose. Actually, bears are not true hibernators, they enter a torpid state which is slightly different from true hibernation. In true hibernation, like...
Today, it's not a question if polar bears are endangered. It's just a matter of how long. But even more, polar bears aren't the only ones in danger. Their prey is also being wiped out by global warming -- putting polar bears at greater risk of starving. The World Wildlife Fund an...
People could be changing how bears sleep, and not in a good wayLindsay Dodgson
故选C。 4.B 细节 题。 第五段前 句Some other animals sleep for a long time in winter. They are in hibernation.和该段末句 Bears, snakes and frogs are such animals.可判断, 熊和蛇属 于冬眠动物。 故选B。 反馈 收藏
They are safe and warm in their homes in winter.Some other animals sleep for a long time in winter. They are in hibernation(冬眠). They eat much food in autumn. In winter they eat nothing. They're very hungry when they wake up in spring.They usually look for food in March or April...
thousands ofbats. You see, when winter rolls around, bats join thebearschipmunksand other furry mammals and tuck in tight forhibernationHibernationconserves energy during the season when food is scarce and the weather is harsh. The birds of the night take their winter sleep in caves calledhib...
even the laziest could put Usain Bolt to shame. And all that time spent napping seems to have no effect on their natural agility should a dog suddenly appear in the garden. Similarly, black and brown bears manage to come out of several months of hibernation with their muscle m...
Bears hibernate through the winter. They take a long sleep. This helps them live through the cold months. They don't have to worry about finding food. Some animals do the same thing in the summer. They have a summe...