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    Mass Extinction In Movies

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    The Massest of Mass Extinctions With all the post-apocalyptic themed movies coming out of Hollywood, most people are probably familiar with the concept of a mass extinction. In those kind of movies the cause is often a manmade problem, such as nuclear war. However, in the earth’s distant past, we were not around to destroy ourselves. So what happened? 250 million years ago the Permian period came to an end in a mass extinction causing 95% of species living in the ocean to die (Cort, 2006). To paint a picture of the Permian into your mind, forget all you learned in grade 8 geography class; all the continents we know today were stuck together, forming a supercontinent called Pangaea. This is a time after the Carboniferous period, a period…

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    The Great Dividing Ranges

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    The Great Dividing Ranges also known as the Eastern Ranges are a mountain range geographically located in Australia. The great ranges spand from the north eastern tip of Queensland down southwards to the edge of New South Wales eventually ending in the west most part of Victoria. In total the Ranges length rounds off to a distance of 3,500 kilometres, long enough to earn it the title of third longest land based range in the world. The width of the range varies slightly along its length from…

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    naturally digest. So, vertebrates must rely on gut bacteria that are capable of digesting cellulose through fermentation. This symbiotic relationship would be facilitated by thermoregulation, as gut bacteria possess an ideal habitable temperature range. Plant digestion would also be facilitated through enhanced means of mechanical digestion, such as blunt teeth, a strong jaw capable of crushing plant matter, and a jaw capable of grinding-motion. Herbivory is unknown among the first tetrapods but…

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    Chordates Research Paper

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    Hyperoartia only have one creature per class, the former being hagfish and the latter being lampreys. The class Myxiniare found anywhere from the depths of the sea to the shallowest areas of the oceans. The Hyperaortia originated in the Atlantic Ocean and have migrated to the Great Lakes. The next class, Placodermi, are an extinct group of armored fish. The class Chrondrichthyes are cartilaginous fish found alongside the class, Actinopterygii, otherwise known as the bony fish, in various aquatic…

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    the inside of Earth was fluid, and disagreeing with Lord Kelvin on the age of the earth. After closely observing a globe it shows that the continents come together like a puzzle : the west African coastline seems to fit into the east coast of South America and the Caribbean sea; and the same appears across the Pacific. The fit is even more striking when the submerged continental shelves are compared rather than the coastlines. In 1912 Alfred Wegener (1880-1930) noticed the same thing and…

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    their structure was just cartilage. The first fish with jaws was the Placoderms. At the end of this period there was a mass extinction sadly this extinction effected the Devonian water habits and the land. The most affected species were sponge and coral. The climate was relatively warm and dry in some regions. The fifth period was the Carboniferous Period during this period there was large amounts of coal deposits underground. Also the effects of having various amounts of vegetation grow caused…

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    Mass Extinction Paper

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    Benton (1995), but Barnosky et al. (2011) also found the following data disparity in literature: 1) sparse, patchy data on fossil record that varied considerably on geography, 2) lack of data on all taxa that creates the possibility of analysis on a subset of available taxa, 3) analysis is usually based on genus, not on species level, 4) extinction is only considered when no fossil record is observed, therefore underestimates the actual extinction of species, 5) discontinuous sampling of…

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    over time sharks have developed them. Male sharks today have claspers that are used to mate with females; the cladoselache lacked those too. Ctenacanths are another type of shark that were around at about the same time as the cladoselache. Ctenacanths continued development for over a million years. These sharks are identified by their fin spines that are long and cylindrical with comb like ridges. The oceans after the mass extinctions had less fish and lots of open ecological niches. The…

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    crisis can negatively affect our planet. Lastly, humans are being affected through air pollution causing health problems. Air pollution has become a factor in a human being declining health. “In northern China, life expectancy has gone down 5.5 years because of air pollution” (Gore 119). For us to have a better understanding as to why our health and life expectancy are rapidly “dropping”, we need to understand what causes air pollution. Gore states “the burning of fossil fuel and coal that…

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    Eurypterid Research Paper

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    The Eurypterids had great diversity and included various forms of gigantism. Large predatory pterygotids (Eurypterina) became longer in the Siluro-Devonian while sweep feeding Hibbertoperids (Stylonurina) exhibited greater mass from Carboniferous to end Permian (Lamsdell et al, 2010). Various studies were done to determine whether the abiotic environmental factors or the biotic factors such as competition was behind these evolutionary traits. It has been suggested that pterygoids incorporated…

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