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What is the definition of a geographical barrier?

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A geographical barrier can be defined as a naturally occurring formation or body of water that segregates and isolates an area. Common geographic barriers are mountains, glaciers, islands, lakes, oceans, rivers and canyons.

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What is the definition of a geographical barrier?
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A geographical barrier can cause allopatric speciation. This occurs when a geographical barrier isolates a species and causes it to evolve into a new species. The population of a species becomes separated by the geographical barrier, forming two groups. The group that is isolated by the barrier can not mate with the other group, which causes the gene pool of the isolated species to become significantly smaller, leading to the formation of a brand new species.

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  • Q:

    What is a good example of an allopatric speciation?

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    According to National Geographic, a good example of allopatric speciation is the formation of new squirrel species after the formation of the Grand Canyon. The geographic isolation of the squirrels at the north and south rims of the canyon does not allow them to breed with each other.

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  • Q:

    How are city boundaries determined?

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    A physical boundary of a city can be determined by a geographical formation such as a river or a mountain. A figurative boundary is an imagined line that defines a city. Figurative boundaries are more complicated because there are several factors that can influence them.

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  • Q:

    How does geography affect history?

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    Geography affects every aspect of history as it is responsible for determining the winners of wars, the prosperity of people and the formation of cultures. To quote the Bradley Commission on History in Schools, "...geography is by nature the constant companion of historical studies; it is hardly possible to grasp the one without the other." Because the events of history take place on the stage of the world, they are inevitably influenced and even determined by geography.

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  • Q:

    Where are there maps of the earthquake fault lines near me?

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    An individual can find maps of earthquake fault lines at the U.S. Geological Survey website that provides interactive maps that an individual can personalize for their area. There is also a map available courtesy of USGS on the KQED News website.

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