Answer to Question 1
A
Answer to Question 2
Global commerce between the United States and the rest of the world came to a halt on September 11, 2001, when terrorists attacked the United States. Air transportation into and out of the United States and even some domestic flights were suspended. Ocean vessels loaded with containers and other freighter ships were prevented from unloading or loading in the major ports. Many had to anchor off the coast for days, waiting to come into the assigned port. Fresh fruits and vegetables rotted, and needed materials did not arrive on time. It was a frightening period but a time when we saw firsthand how global and interdependent with the rest of the world we had become.
Before the events of September 11, 2001, ships would frequently clear U.S. ports in a matter of hours. That scenario has changed because of security measures that have been introduced. More cargo inspections, much more paperwork, and a longer time to clear U.S. borders are now a reality. Ships may be stopped and inspected and cargo inspected and checked. Some ships and items are given very close scrutiny because of their country of origin.
Given the importance of global trade to the United States, a delicate balance exists between security and the efficient flow of global commerce. If security is too tight it could impede the flow of needed goods or materials, causing delays and decreased efficiency. Ports and border gateways can become congested because of security measures. Consequently, clearance time has increased from hours to days in some instances.
The Role of Summation in Long-Term Potentiation
Role of alternative splicing in the perception of sounds of different frequency
Normal oxygen sensor frequency is from about one to five times per second.
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The consequences of the intensity of natural selection on allele frequency.