Polar bears paper - Fiscus 1 Brittany Fiscus Professor...

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Fiscus Brittany Fiscus Professor Christmas Biology 102 May 05, 2010 Polar Bears Polar bears evolved from a group of brown bears thousands of years ago, which became isolated from other brown bear populations by glaciers. (actionbioscience.org, Adaptations) “The rapid changes from a brown bear to a polar bear include these: White-yellow fur that helps them meld into their background as they sneak up on their prey claws that are catlike, an adaptation to grasp fleeing prey smaller ears to avoid freezing in the frigid winters a narrower and more elongated skull, an adaptation perhaps to warm cold inhaled air, to aid the sense of smell, or to assist with the capture of prey trying to slip through a narrow opening to the safety of the sea below” Polar bears have a couple adaptations such as swimming, diving, and thermoregulation. Each adaptation requires special intent in how polar bears react to the situation. In swimming, polar bears are considered strong swimmers and can swim for long periods of time swimming at the most 62 miles. They have thick blubber that is 4.3 inches thick which helps them swim in cold water. When diving, polar bears make 1
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Fiscus shallow dives when stalking prey, navigating ice floes, or searching for kelp. They are able to submerge for at least two minutes diving as deep as 14 feet. The last adaptation is thermoregulation. Because polar bears have fur that is 4.3 inches think, they have
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Polar bears paper - Fiscus 1 Brittany Fiscus Professor...

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