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Tutor profile: Zach C.

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Zach C.
Medical Student with 5 Years of Tutoring Experience
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Questions

Subject: SAT

TutorMe
Question:

What could be best inferred about the author's attitudes on global warming?

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Zach C.
Answer:

Remember that our answer must always be based upon facts in the texts. Since this is an inference question, we know that the answer is usually based upon specific sentences rather than the passage as a whole. We should start by checking the first sentences of the paragraphs to remind ourselves exactly when does the author talk directly about global warming. Specifically, since this is an attitude question, we will likely need to know what impacts this may have or credibility of the idea. Remember that attitude statements are usually not explicit, as the passage will focus on objective content over subjective opinions. If the author follows up a point with a contrasting point that is expounded upon, they likely do not believe the first.

Subject: Chemistry

TutorMe
Question:

Why does the energy of a system decrease when a liquid evaporates?

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Zach C.
Answer:

When a liquid evaporates, as you know, it turns into a gas. The importance difference to remember here is that molecules of a gas move at higher speeds than molecules of a liquid. Since the molecules are moving quickly, just like how swinging a bat faster hits a ball farther, the speed of the molecules indicate they have more energy. Now, we cannot create or destroy energy normally. After all, the more work you do as a person, the more tired you feel. Something, just like you do when you swing the bat, has to give energy to the evaporating gas. This is the liquid that remains. It has to give up energy to the escaping molecules that evaporate away. So the energy of the system does not disappear, but it is lost to the produced gases.

Subject: Biology

TutorMe
Question:

Explain why one gene of an organism can produce many different genetic products?

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Zach C.
Answer:

As one may know already, a gene is a series of nucleotide bases in a chromosome that codes for some genetic product. However, not all of the bases will end up in the final product. We call the sections that are left out introns, and the sections that are used are called exons. These sections are genetically marked so the cell know where these sections begin and end. There is nothing special about which sections are exons though, because we can choose which exons we want in the final product at will. This is called alternate splicing. A working analogy may be writing a sentence. If we write, "I will be home to help make dinner after I finish studying with my study group." Two alternate splicings would be, "I will be home studying with my study group." "I will be home to help make dinner." We can pick out pieces of the sentence and pick them together as much as we like, as long as it makes sense. Similarly, we can produce many different genetic products by choosing different parts and, as the sentences show, get products with sometimes very different outcomes.

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