Polar Bears I. Introduction a. Polar bears have lived in extremely harsh conditions‚ and with global warming made their way to being endangered. Polar bears have opened eyes on how we see extreme weather and how to survive in it. i. Body of bear‚ what they eat‚ where they find shelter II. Body of polar bear a. How
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In this essay I will be talking about The ‘Evolution of Polar Bears from Brown Bears‚ specifically skin and fur colour‚ skull and ear shape‚ and digestion of seal fat’ ill also talk about the two theorists Jean-Baptiste Lamark (1744-1829) and Charles Darwin (1809-1882). Charles Darwin’s theory states that the change in evolution is the variation in each generation and different individual surviving features with different combinations of the variable. The Individuals with characteristics that increase
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a different species. Polar bears have gone under a series of evolutionary changes over time to help them survive in conditions on the planet some such adaptations include larger paws‚ thicker white fur‚ extra fat to keep them warm and more recently they have developed polar bear type teeth. These
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co-evolution. Divergent evolution is when two or more animals originate from a common genetic base. To prove divergent evolution in animals‚ the Ursus Maritimus or polar bear is an example. Divergent evolution is when similar animals branch off becoming dissimilar as time goes. Divergent evolution occurred 125‚000 years ago when brown bears were isolated from their ancestors. This movement got them stranded and trapped by glacial ice and happened because of geographic isolation which is being separated
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In the articles "The Anglerfish Ambush Predator of the Deep"‚ by Larry Brown and "Polar Bear"‚ by Shandra Brady I learned how anglerfish and polar bears adapt to their enviornments. Anglerfish live deep in the sea. Polar bears live in the icey cold artic. These are both hard places to adjust to. Anglerfish have fang-like teeth that are angeled inward for efficent prey grabbing. Female anglerfish have a spine that resembles a fisshing pole sticking out of their back called an "illicium" and at the
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The Polar Bear and Adaptations The polar bear is seen by many as the beautiful white bear that lives in the cold and ice of the areas within the North Pole. They may never look beyond the beauty to see the animal has progressed through natural selection to become a creature that endures and thrives in the frigid temperatures and prolific ice. The polar bear has adapted in various ways such as temperature regulation‚ hunting skills‚ movement in water and on ice. The bears white coat makes hunting
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ecologists. Severe declines in polar bear populations are more noticeable as periods of sea ice cover are steadily declining. A decrease in sea ice is leading to nutritional stress in polar bears due to shorter periods available in prime hunting grounds. As a necessity to the polar bear’s niche a loss of sea ice has harmful implications to polar bear populations. Not only are hunting grounds being lost but industrialization and human habitation are decreasing the size of the polar bear’s natural habitat
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Polar Bears Suffering: How Global Climate Change is Affecting Their Home Keelei Sage BIO 240 12:30 pm T/Th Dr. Zanatta Fall 2012 When I was about nine-years old I went to the Detroit Zoo for the first time‚ and I remember the best part was getting to go inside the big tunnel and see the polar bears and seals swimming all around me. It was on of the greatest experiences from my childhood‚ and I want my children to be able to have the same experience. Polar bears are one of the most interesting
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The polar bear‚ also known as the white bear‚ northern bear‚ or sea bear‚ is a large bear native to the Arctic. It is one of the two largest land carnivore species and the top predator within its area. It is well adapted to its habitat: it has thick blubber and fur to insulate to it against the cold as well as white colored fur that camouflages it from its prey. The polar bear hunts well on land‚ on the sea ice‚ as well as in the water. The polar bear is a circumpolar species found in and around
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more about is the Ursus maritimus‚ commonly known in North America as a Polar Bear. Ursus maritimus is the Polar Bear’s scientific name which means sea bear; it received this name because it is heavily involved in the water and is the only bear considered to be a marine mammal. There is one documented Polar Bear that undertook a 426-mile swim that took nine days and did not rest on land; they are phenomenal swimmers. Polar Bears are found in the wild in the Circumpolar North‚ which consists of countries
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