A<span> fuel (sugar from food) <span>and oxygen with which to burn the fuel. One then also needs a mean of removing the waste products produced by burning the fuel.</span>
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I think they area as a result of a rapid gastric emptying and creation of high osmotic gradient in the small intestine that causes a sudden shift of fluid from the blood vessels to the intestinal lumen. Gastrectomy is the removal of part or all of the stomach. A partial gastrectomy involves the removal of a part of the stomach, the lower half is removed mostly, while full gastrectomy involves the removal of the entire stomach.
Oil Coal and Natural Gas are the fossil fuels the USA has the most reserves of. Given that only one of them is on the answers Coal is the correct answer.
The best answer for this question would be:
D. Polymerase chain reaction
<span>It is used in molecular biology in order to create small fragments of the DNA. Those copies of the DNA mimic the happenings in the cell. This chain reaction is an efficient technique to further research on crimes.</span>
