百度试题 结果1 题目 (C)4.- How long do the bears hibenate ()?-The bears hibernate for about months A. four B. five C. four or five D. five or six 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
(10分)Do you know some animals hibernate (冬眠) in winter? Bears,snakes, frogs and some other animals spend the winter in a state like deep sleep. In autumn, the bear eats and eats and becomes very fat. Its hair grows longer. In late autumn, it finds a warm place and goes to ...
Polar bears do not hibernate. Only pregnant polar bears den. Unlike hibernation, a polar bear's heart rate and temperate do not decrease, this ensures the cubs will stay warm. The denned polar bear does not eat, but relies on her fat reserves to sustain herself and her cubs while in th...
Read More:How Long Do Polar Bears Hibernate? Apart from polar bears, American black bears and grizzly bears also share four physiological states; these are walking hibernation, hyperphagia, usual activity, and hibernation. The adaptations of hibernating polar bears present certain consequences for human...
Deep inside their dens, or wherever they choose to hibernate, bears sustain physiological extremes that would kill any human. In black bears, Kelly regularly observes November hibernation heart rates of 50 beats per minute. But by January these rates plummet to less than half that. Some have ...
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.
In which season do animals like bears often hibernate? A. Spring B. Summer C. Autumn D. Winter 相关知识点: 试题来源: 解析 D。解析:在冬季,一些动物如熊会冬眠,因为冬季食物短缺,通过冬眠来度过寒冷且食物匮乏的时期。春季动物苏醒,夏季动物活跃地觅食等,秋季动物为冬眠做准备。
The Arctic winter is a challenging period for all its inhabitants, including the effective predators, polar bears. A frequent question that arises in understanding polar bear habits is, do polar bears hibernate? Unlike brown or black bears, polar bears do not hibernate during the winter, despite...
15.Alaskan black bears hibernate for up to seven months a year.during which time they do not eat or drink.before waking up in virtually the same physical state they fell asleep in.Now experts hope to develop methods of putting humans into a similar sta
American black bears appear in a variety of colors despite their name. In the eastern part of their range(地理分布区) most of these bears have shiny black fur but in the west they grow brown red or even yellow coats. To the north the black bear is actually gray or white. Even in the...