Why Do Bears Hibernate? by Darice Bailer (Tell Me Why, Tell Me How series) (eBook)Bailer, Darice
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...
C.research into hibernation in animals may help deadly patients stay longerD.scientists have already take advantage of the different levels of hibernation in space missions.答案68.A 细节理解题,根据第一段Alaskan black bears hibernate for up to seven months a year可知阿拉斯加黑熊...
With changes in the availability and accessibility of food, polar bears are now staying on land for longer periods, which, some might mistakenly attribute to a sign of hibernation-related behavior, furthering the debate,do polar bears hibernate?
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 in dens(兽穴). Frogs hibernate at the bottom of 5 . The water does not freeze there. Bats hibernate in caves 6 upside down. Many animals 7 active in winter. Rabbits grow new thicker fur to stay 8 . Squirrels gather nuts and 9 them to eat during the ...
Some bears hibernate in hollowed-out tree trunks. Some take a months-long rest beneath thick brambles and brush. Others dig into the hills to forge snug dens. And still others discover caves to hide away from the biting winter chill. ...
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 state which could help astronauts survive...
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 stat
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。