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In highlight text, the author of the passage raises the possibility that taller people achieved greater success most probably in order to

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题目： The Yorgorian people, many of whom still live in the jungle in traditional conditions, eat many meats of jungle mammals, resulting in a cuisine that is high in the protein RX7G, much higher than the cuisine of the industrial nation of Transpraxia. Medical research has shown a high correlation between the protein RX7G and coronary heart disease, and yet, the Yorgorian people have a much lower incidence of such disease than found in Transpraxia. Medical researchers have dubbed this the Yorgorian Paradox. Which of the following, if true, helps to explain the Yorgorian Paradox?

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Charcoal from a hearth site in Colorado, 2,000 miles south of Alaska, is known to be 11,200 years old. Researchers reasoned that, since glaciers prevented human migration south from the Alaska-Siberia land bridge between 18,000 and 11,000 years ago, humans must have come to the Americas more than 18,000 years ago.

Which of the following pieces of new evidence would cast doubt on the conclusion drawn above?

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Unprecedented industrial growth in the country of Remo has created serious environmental problems because factories there lack adequate pollution-control systems. Remo is developing a clean growth plan that includes environmental regulations that will require the installation of such systems. Since no companies in Remo currently produce pollution-control systems, the plan, if implemented, will create significant opportunities for foreign exporters to market pollution-control systems.

Which of the following, if true, most seriously weakens the argument?

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People with a certain eye disorder are virtually unable to see in moderately bright light, which seems to them unbearably intense, since the cells of their retinas are overwhelmed by moderately bright light. These people do, however, show normal sensitivity to most components of dim light. Their retinal cells are also not excessively sensitive to red components of moderately bright light.

The information above best supports which of the following hypotheses about people with the disorder described, if they have no other serious visual problems?

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题目： Power Plant Spokesperson: "The water quality of the Phage River as it passes through Praseopolis is below federal standards. The citizens of Praseopolis often blame the poor water quality on our coal-burning power plant, which is upstream from Praseopolis. But Vulcan Refinery, along a tributary of the Phage River even further upstream, releases several toxins into the water. Moreover, over 99% of the toxic materials measured in the Phage River in the vicinity of Praseopolis are consistent with metal refining, but not with the by-products of coal combustion." In the power plant spokesperson's argument, the portion in boldface plays which of the following roles?

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题目： On a given day, 50 people took a test that is designed to measure a candidate's aptitude. Some of the 50 people will take the test in the morning, and the remaining of the 50 people will take the test in the afternoon. What is the average (arithmetic mean) score on the test for the 50 examinees?(1) The average score for the examinees who take the test in the morning was 68.2.(2) The average score for the examinees who take the test in the afternoon was 74.3.

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Sunflowers growing in pots were placed, with their roots submerged, in the pond contaminated with radioactive elements. The sunflowers kept growing; in the process, they absorbed radioactive elements. Within twelve days, 85 percent of the radioactive elements were removed from the water, which is no less than can be accomplished with the much more expensive conventional filtration techniques. Scientists therefore propose using sunflowers for decontamination wherever there are radioactively contaminated ponds.

Which of the following, if true, points to a limitation on the applicability of the proposed method of decontamination?

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题目： Which of the following points could lie in the same quadrant of the xy-coordinate plane as the point (a, b), where $$ab \neq 0$$ ?

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During the summer of 1778, seeking to find alternative explanations for the process of evolution, Jean-Baptiste Lamarck repeated his initial experiment on mollusks once in every 4 weeks but received exactly the same results 3 times in a row.

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The soap manufacturer conceded that its product may have contributed to the recent outbreak of skin irritation experienced by its consumers and having pulled the product, led to a sharp drop in the company's share price.

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题目： Even-toed ungulates, including pigs, cattle, goats, and sheep, and odd-toed ungulates, such as horses and donkeys, account for all the mammals domesticated for agricultural purposes.

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题目： While many people believe either lead or gold is the densest naturally occurring element, osmium, due to a pattern of density among the elements, holds this distinction, and they call it "Lathanide contraction."

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A Swiss government panel recommended that the country sell about half its gold reserves and this raised fears of other countries that do the same and inundate the market.

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Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected the Hudson River at Albany to the Great Lakes at Buffalo, providing the port of New York City with a direct water link to the heartland of the North American continent.