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www.GOALias.blogspot.comtheir predators. It also helps them incatching their prey. To protect themfrom extreme cold, they have two thicklayers of fur. They also have a layer offat under their skin. In fact, they are sowell-insulated that they have to moveslowly and rest often to avoid gettingoverheated.Physical activities on warm daysnecessitate cooling. So, the polar beargoes for swimming. It is a goodswimmer. Its paws are wide and large,which help it not only to swim well butalso walk with ease in the snow. Whileswimming under water, it can close itsnostrils and can remain under water forlong durations. It has a strong sense ofsmell so that it can catch its preyfor food. We can understand theadaptations of polar bears with the helpof the flow chart shown in Fig. 7.3.Another well-known animal living inthe polar regions is the penguin(Fig. 7.4). It is also white and mergeswell with the white background. It alsohas a thick skin and a lot of fat to protectit from cold. You may have seen picturesof penguins huddled together. This theydo to keep warm. Recall how warm youfeel when you are in a hall full of people.Fig. 7.4 Penguins huddled togetherFig. 7.3 Adaptations of polar bear, CWEATHEREATHER, , CLIMATEAND ADAPTATIONSOF ANIMALSTO CLIMATE7373