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Sabina S.
Duke University Student, Tutor for four years
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SAT
TutorMe
Question:

[1] The main environmental problem caused by the production of Greek yogurt is the creation of acid whey as a by-product. [2] Because it requires up to four times more milk to make than conventional yogurt does, Greek yogurt produces larger amounts of acid whey, which is difficult to dispose of. [3] To address the problem of disposal, farmers have found a number of uses for acid whey. [4] They can add it to livestock feed as a protein supplement, and people can make their own Greek-style yogurt at home by straining regular yogurt. [5] If it is improperly introduced into the environment, acid-whey runoff can pollute waterways, depleting the oxygen content of streams and rivers as it decomposes. [6] Yogurt manufacturers, food scientists; and government officials are also working together to develop additional solutions for reusing whey. To make this paragraph most logical, sentence 5 should be placed A) where it is now. B) after sentence 1. C) after sentence 2. D) after sentence 3.

Sabina S.
Answer:

A is incorrect because where the sentence is now interrupts the thoughts about how to get rid of the whey run off. It should be placed closer to the beginning where the problem of acid whey is introduced. D is incorrect because it also interrupts the transition into the solution to the problem. Sentence five is still talking about the problem so it cannot be placed here once the paragraph has begun talking about the solution. Between B and C can be the trickier choice to make. B- after sentence one makes logical sense because here only the problem is still being discussed, however sentence five talks about the dangers of whey run off (excess whey) which has not been discussed (only acid whey itself). Thus C is the correct answer because sentence 2 introduces the difficulty of disposing excess acid whey run off and Sentence 5 going directly after explains the hazards of excess whey. This is the best logical order.

Biology
TutorMe
Question:

Membrane-bound organelles have been an important component in the evolution of complex, multicellular organisms. Which of the following best summarizes an advantage of eukaryotic cells having internal membranes? a)Eukaryotic cells are able to reproduce faster because of the presence of organelles. b) Some organelles, such as mitochondria and chloroplasts, are similar to prokaryotic cells in structure. c)Organelles isolate specific reactions, increasing metabolic efficiency. d)Compartmentalization leads to a higher mutation rate in DNA, which leads to more new species.

Sabina S.
Answer:

Organelles can contain vastly different internal environments that allow reactions to take place outside of the the main cellular compartment. This prevents certain reactions from interfering with other important ones occurring in the same space. An example is the lysosome which has a lower pH than the rest of the cellular environment as it has the job of breaking down materials. As long as it's internal materials are contained in this acidic space, it will continue to work properly and the rest of the cell won't be affected by the digestive qualities of the lysosome. This contributes to increased metabolic efficiencies. A is incorrect because organelles have no impact on reproduction. B is incorrect because while this statement is true and supports the endosymbiosis theory, it has no relevance to this question as it does not explain an advantage. D is incorrect because compartmentalization does not lead to a higher mutation rate.

College Admissions
TutorMe
Question:

How do I find extracurricular activities that will be beneficial on my resume?

Sabina S.
Answer:

The most important thing is to participate in activities that you love or want to put a lot of time into. The more time and dedication spent in an activity, the more you'll get out of them and the more favorable they look for colleges. Also what is important is to choose activities that go beyond "joiner" status, these are big name communities that have members in the hundreds. While these too are important, you should pursue opportunities that are unique and are harder to acquire and feature in depth application and learning. I have compiled information about different areas of interests and some opportunities that go along with them that feature qualities of dedication, talent, and in depth learning.

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