Then comes the 1 . How do animals spend the winter?Some birds fly 2 for the winter. They go to a warmer place for food. This is 3 a migration(移栖).Some animals hibernate(冬眠) all winter. This is a deep 4 . Bears hibernate in dens(兽穴). Frogs hibernate at ...
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Although ice crystals form under the skin when frogs hibernate in the winter, a high concentration ofglucose occurring naturally in the frog's organs prevents the animal from freezing. Even when a deep freeze causes the frog's heart to stop beating and the frog to stop breathing, the body w...
Although ice crystals form under the skin when frogs hibernate in the winter, a high concentration ofglucose occurring naturally in the frog's organs prevents the animal from freezing. Even when a deep freeze causes the frog's heart to stop beating and the frog to stop breathing, the body w...
Long Answer Questions 12videos NATURAL RESOURCES Similar Questions Even when a lake freezes in winters, how do the animals survive deep inside the lake. View Solution When and why do some animals like frogs hibernate ? View SolutionKnowledge Check...
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HIBERNATE冬眠 Some animals "hibernate" for part or all of the winter. This is a special, very deep sleep. The animal's body temperature drops, and its heartbeat and breathing slow down. It uses very little energy. In the fall, these animals get ready for winter by eating extra food ...
They do this to prevent their body from crushing their internal organs because of the huge weight. Some species, like frogs, don’t need to sleep for months; they just close and rest their eyes. Giraffes can sleep 30 minutes per day while horses can sleep for 2 hours. Both can just sl...
How do they know when it is time to leave for the winter? Scientists are still studying this. Many see migration as part of a yearly cycle of changes a bird goes through. The cycle is controlled by changes in the amount of daylight and the weather.Birds can fly very long distances. ...