<span> It has been in operation for only 18 months between April 1860 and October 1861, the Pony Express nevertheless has become synonymous with the Old West. Hope this helps
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<em>Answer:</em>
Erosion such as rain and wind, as well as landslides due to flooding. Some mountains tectonic plates shift, also gravity is a big factor.
<em>Explanation:</em>
There are many, many factors that cause mountains to change with time, but ultimately they can be broken down into the factors that decrease the mountain altitude versus those that increase it. The height of a mountain is the result of the competition between the forces of uplift through deformation, and the forces of attrition or weathering and transport by gravity (always downhill!) Gravity then takes these particles downhill. If it rains, the rocks and sands get carried by water downstream. Also when it rains, the rocks dissolve a little bit and the rivers wash the cations carried in solution into the ocean.
<em>Have a beautiful day!</em>
It was just very quiet.
Hope I helped :)
Answer: Researchers agree that schizophrenia is about <u>80%</u> heritable.
Explanation:
This mental illness can be hereditary in most family when there is a diangises. However, it does not have to be a close family member such as a mother, brother, sister, or father. This mental illness can be passed down generations and skipped generations. Uncles, cousins, and a grandparent from the past may have suffered from schizophrenia. In addition, Autism is another illness that can be hereditary.
This mental illness is not based on genetics alone, and each family will be spoken to by a medical professor to see where the mental illness originated. There are still 20% of people <u> </u> with schizophrenia that have no family that has the mental illness.
Answer:
Pearl Harbor
Explanation:
The Army base was targeted by Japan to weaken America's army so the Pacific islands could easily be conquered by the Japanese
