Question:
Many millennia before the invention of herbicides, farmers simply plowed their fields to control weeds. Even today, plowing can constitute a  valuable part of an integrated weed-management 5 program. Although plowing kills standing weeds, farmers have long known that it often leads to the emergence of new weed seedlings in a few weeks.Ecologists have shown that a farmer's field can have 50,000 or more weed seeds per square meter 10 buried beneath the soil surface. Plant physiologists have shown that seeds buried more than about one centimeter below the soil surface do not receive enough light to germinate. Do the blades of a plow, which can reach more than a foot beneath the soil15 surface, bring some of these buried seeds to the surface where their germination is induced by exposure to sunlight?Two ecologists, Jonathan Sauer and Gwendolyn Struik, began to study this question in the 1960s. In a 20 relatively simple experiment, they went to ten different habitats in Wisconsin during the night and collected pairs of soil samples. They stirred up the soil in one sample of each pair in the light and stirred up the other sample of each pair in the dark. They then25 exposed all ten pairs to natural sunlight in a greenhouse. For nine of the ten pairs of soil samples, weed growth was greater in the samples stirred up in light. They concluded that soil disturbance gives weed seeds a "light break," and this stimulates their 30 germination.More recently, Karl Hartmann of Erlangen University in Germany reasoned that when farmers plowed their fields during the day, the buried weed seeds are briefly exposed to sunlight as the soil is35 turned over, and that this stimulates their germination. Although the light exposures from plowing may be less than one millisecond, that can be enough to induce seed germination. Thus the germination of weed seeds would be minimized if40 farmers simply plowed their fields during the night, when the photon fluence rate [the rate at which photons hit the surface] is below $10^{15}$ photons per square meter per second. Although even under these conditions hundreds of millions of photons strike 45 each square millimeter of ground each second, this illumination is below the threshold needed to stimulate the germination of most seeds.Hartmann says that he was very skeptical when he first came up with this idea because he assumed 50 that such a simple method of weed control as plowing at nighttime must be ineffective or it would have been discovered long ago. But the subsequent experiments, first presented at a 1989 scientific meeting in Freiburg, Germany, clearly demonstrated 55 that the method can be effective.Hartmann tested his idea by plowing two agricultural strips near Altershausen, Germany. The farmer Karl Seydel cultivated one strip, repeated threefold, at around midday and the other strip60 at night. No crops were planted in these pilot experiments, to avoid possible competition with the emerging weeds. The results were dramatic. More than 80 percent of the surface of the field plowed in daylight was covered by weeds, whereas 65 only about 2 percent of the field plowed at night was covered by weeds.This method of weed control is currently being used by several farmers in Germany. Because many of the same weed species that invade farmers' fields70 in Germany also invade fields elsewhere in the world, this method should be successful elsewhere. In fact, recent studies at universities in Nebraska, Oregon, Minnesota, Denmark, Sweden, and Argentina support this idea. Number of Emerged Seedlings in Soil Samples One Month after Soil Was Disturbed\begin{center}\begin{tabular}{|c|l|c|c|}\hline\multirow{2}{*}{Sample} & \multicolumn{2}{|c|}{Source of soil} & \multicolumn{2}{|c|}{$\begin{array}{c}\text { Number of emerged } \\\text { seedlings in soil } \\\text { disturbed in }\end{array}$} \\\cline { 3 - 4 }&  & light & darkness &  \\\hlineA & deciduous woods & 4 & 0 &  \\\hlineB & deciduous woods & 2 & 1 &  \\\hlineC & deciduous woods & 6 & 2 &  \\\hlineD & conifer plantation & 8 & 3 &  \\\hlineE & conifer plantation & 2 & 1 &  \\\hlineF & tall-grass prairie &  & 1 &  \\\hlineG & old pasture & 0 & 2 &  \\\hlineH & old pasture & 2 & 1 &  \\\hlineI & muck field & 14 & 2 &  \\\hlineJ & muck field & 5 & 3 &  \\\hline\end{tabular}\end{center}Adapted from Jonathan Sauer and Gwendolyn Struik, "A Possible Ecological Relation between Soil Disturbance, Light-Flash, and Seed Germination." @1964 by Jonathan Sauer and Gwendolyn Struik.
Question: The passage suggests that if Seydel had planted wheat or corn on the two agricultural strips in Hartmann's experiment, the percentage of the surface of each strip covered with weeds would likely have been
 A. lower than the percentage that Hartmann found.
 B. higher than the percentage that Hartmann had predicted.
 C. nearly impossible for Hartmann to determine.
 D. comparable to Hartmann's original projection.
Answer:

Choices:
- A
- B
- C
- D

Many millennia before the invention of herbicides, farmers simply plowed their fields to control weeds. Even today, plowing can constitute a  valuable part of an integrated weed-management 5 program. Although plowing kills standing weeds, farmers have long known that it often leads to the emergence of new weed seedlings in a few weeks.Ecologists have shown that a farmer's field can have 50,000 or more weed seeds per square meter 10 buried beneath the soil surface. Plant physiologists have shown that seeds buried more than about one centimeter below the soil surface do not receive enough light to germinate. Do the blades of a plow, which can reach more than a foot beneath the soil15 surface, bring some of these buried seeds to the surface where their germination is induced by exposure to sunlight?Two ecologists, Jonathan Sauer and Gwendolyn Struik, began to study this question in the 1960s. In a 20 relatively simple experiment, they went to ten different habitats in Wisconsin during the night and collected pairs of soil samples. They stirred up the soil in one sample of each pair in the light and stirred up the other sample of each pair in the dark. They then25 exposed all ten pairs to natural sunlight in a greenhouse. For nine of the ten pairs of soil samples, weed growth was greater in the samples stirred up in light. They concluded that soil disturbance gives weed seeds a "light break," and this stimulates their 30 germination.More recently, Karl Hartmann of Erlangen University in Germany reasoned that when farmers plowed their fields during the day, the buried weed seeds are briefly exposed to sunlight as the soil is35 turned over, and that this stimulates their germination. Although the light exposures from plowing may be less than one millisecond, that can be enough to induce seed germination. Thus the germination of weed seeds would be minimized if40 farmers simply plowed their fields during the night, when the photon fluence rate [the rate at which photons hit the surface] is below $10^{15}$ photons per square meter per second. Although even under these conditions hundreds of millions of photons strike 45 each square millimeter of ground each second, this illumination is below the threshold needed to stimulate the germination of most seeds.Hartmann says that he was very skeptical when he first came up with this idea because he assumed 50 that such a simple method of weed control as plowing at nighttime must be ineffective or it would have been discovered long ago. But the subsequent experiments, first presented at a 1989 scientific meeting in Freiburg, Germany, clearly demonstrated 55 that the method can be effective.Hartmann tested his idea by plowing two agricultural strips near Altershausen, Germany. The farmer Karl Seydel cultivated one strip, repeated threefold, at around midday and the other strip60 at night. No crops were planted in these pilot experiments, to avoid possible competition with the emerging weeds. The results were dramatic. More than 80 percent of the surface of the field plowed in daylight was covered by weeds, whereas 65 only about 2 percent of the field plowed at night was covered by weeds.This method of weed control is currently being used by several farmers in Germany. Because many of the same weed species that invade farmers' fields70 in Germany also invade fields elsewhere in the world, this method should be successful elsewhere. In fact, recent studies at universities in Nebraska, Oregon, Minnesota, Denmark, Sweden, and Argentina support this idea. Number of Emerged Seedlings in Soil Samples One Month after Soil Was Disturbed\begin{center}\begin{tabular}{|c|l|c|c|}\hline\multirow{2}{*}{Sample} & \multicolumn{2}{|c|}{Source of soil} & \multicolumn{2}{|c|}{$\begin{array}{c}\text { Number of emerged } \\\text { seedlings in soil } \\\text { disturbed in }\end{array}$} \\\cline { 3 - 4 }&  & light & darkness &  \\\hlineA & deciduous woods & 4 & 0 &  \\\hlineB & deciduous woods & 2 & 1 &  \\\hlineC & deciduous woods & 6 & 2 &  \\\hlineD & conifer plantation & 8 & 3 &  \\\hlineE & conifer plantation & 2 & 1 &  \\\hlineF & tall-grass prairie &  & 1 &  \\\hlineG & old pasture & 0 & 2 &  \\\hlineH & old pasture & 2 & 1 &  \\\hlineI & muck field & 14 & 2 &  \\\hlineJ & muck field & 5 & 3 &  \\\hline\end{tabular}\end{center}Adapted from Jonathan Sauer and Gwendolyn Struik, "A Possible Ecological Relation between Soil Disturbance, Light-Flash, and Seed Germination." @1964 by Jonathan Sauer and Gwendolyn Struik.
Question: The passage suggests that if Seydel had planted wheat or corn on the two agricultural strips in Hartmann's experiment, the percentage of the surface of each strip covered with weeds would likely have been
 A. lower than the percentage that Hartmann found.
 B. higher than the percentage that Hartmann had predicted.
 C. nearly impossible for Hartmann to determine.
 D. comparable to Hartmann's original projection.
Answer: A


Question:
Passage 1.At the 2007 American Geophysical Union’s.meeting in Acapulco, Mexico, some two dozen.scientists presented multiple studies arguing that a.comet or asteroid exploded above or on the northern.ice cap almost 13,000 years ago—showering debris.across the North American continent and causing.temperatures to plunge for the next millennium..The team argues that its idea explains multiple.observations: not only the climate cooling and the.disappearance of the Clovis hunters, but also the.near-simultaneous extinction of the continent’s large.mammals..Not all will be convinced. Several leading.hypotheses already explain each of these three events..A change in ocean circulation is generally thought to.have brought about the onset of the millennium-long.cooling, which is known as the Younger Dryas. This.cooling might, in turn, have caused the Clovis.hunters to disappear. And, if they had not previously.been killed by disease or hunted to extinction, the big.prehistoric beasts may also have been doomed by this.change in climate..The new evidence comes in the form of.geochemical analysis of sedimentary layers at 25.archaeological sites across North America—9 of.them Clovis. Certain features of the layers, say the.team, suggest that they contain debris formed by an.extraterrestrial impact. These include spherules of.glass and carbon, and amounts of the element.iridium said to be too high to have originated on.Earth. In addition, the rocks contain black layers of.carbonized material, which the team says are the.remains of wildfires that swept across the continent.after the impact..Passage 2.Proponents of the Younger Dryas impact.hypothesis have claimed various kinds of evidence.for the hypothesis, including deposits of the element.iridium (rare on Earth but abundant in meteorites),.microscopic diamonds (called nanodiamonds), and.magnetic particles in deposits at sites supposedly.dated to about 12,800 years ago. These claims were.sharply contested by some specialists in the relevant.fields, however, who either did not detect such.evidence or argued that the deposits had other causes.than a cosmic impact. For example, some say that.nanodiamonds are common in ordinary geological.formations, and that magnetic particles could come.from ordinary fires..Now comes what some researchers consider the.strongest attack yet on the Younger Dryas impact.hypothesis. In a paper published recently in the.Proceedings of the National Academy of Sciences,a.team led by David Meltzer, an archaeologist at.Southern Methodist University, Dallas, in Texas,.looks at the dating of 29 different sites in the.Americas, Europe, and the Middle East in which.impact advocates have reported evidence for a.cosmic collision. They include sites in which.sophisticated stone projectiles called Clovis points,.used by some of the earliest Americans to hunt.mammals beginning about 13,000 years ago, have.been found. The team argues that when the quality.and accuracy of the dating—which was based on.radiocarbon and other techniques—is examined.closely, only three of the 29 sites actually fall within.the time frame of the Younger Dryas onset, about 12,800 years ago; the rest were probably either earlier.or later by hundreds (and in one case, thousands) of.years..“The supposed Younger Dryas impact fails on.both theoretical and empirical grounds,” says.Meltzer, who adds that the popular appeal of the.hypothesis is probably due to the way that it provides.“simple explanations for complex problems.” Thus,.“giant chunks of space debris clobbering the planet.and wiping out life on Earth has undeniably broad.appeal,” Meltzer says, whereas “no one in Hollywood.makes movies” about more nuanced explanations,.such as Clovis points disappearing because early.Americans turned to other forms of stone tool.technology as the large mammals they were hunting.went extinct as a result of the changing climate or.hunting pressure..But impact proponents appear unmoved by the.new study. “We still stand fully behind the [impact.hypothesis], which is based on more than a.confluence of dates,” says Richard Firestone, a.nuclear chemist at the Lawrence Berkeley National.Laboratory in California. “Radiocarbon dating is a.perilous process,” he contends, adding that the.presence of Clovis artifacts and mammoth bones just.under the claimed iridium, nanodiamond, and.magnetic sphere deposits is a more reliable indicator.that an extraterrestrial event was responsible for their.disappearance.
Question: According to Passage 1, the team of scientists believes that the black carbonized material found in certain sedimentary layers was caused by which phenomenon following a cosmic collision?
 A. Climate cooling
 B. Mass extinctions
 C. Rapidly spreading fires
 D. Iridium deposits
Answer:

Choices:
- A
- B
- C
- D

Passage 1.At the 2007 American Geophysical Union’s.meeting in Acapulco, Mexico, some two dozen.scientists presented multiple studies arguing that a.comet or asteroid exploded above or on the northern.ice cap almost 13,000 years ago—showering debris.across the North American continent and causing.temperatures to plunge for the next millennium..The team argues that its idea explains multiple.observations: not only the climate cooling and the.disappearance of the Clovis hunters, but also the.near-simultaneous extinction of the continent’s large.mammals..Not all will be convinced. Several leading.hypotheses already explain each of these three events..A change in ocean circulation is generally thought to.have brought about the onset of the millennium-long.cooling, which is known as the Younger Dryas. This.cooling might, in turn, have caused the Clovis.hunters to disappear. And, if they had not previously.been killed by disease or hunted to extinction, the big.prehistoric beasts may also have been doomed by this.change in climate..The new evidence comes in the form of.geochemical analysis of sedimentary layers at 25.archaeological sites across North America—9 of.them Clovis. Certain features of the layers, say the.team, suggest that they contain debris formed by an.extraterrestrial impact. These include spherules of.glass and carbon, and amounts of the element.iridium said to be too high to have originated on.Earth. In addition, the rocks contain black layers of.carbonized material, which the team says are the.remains of wildfires that swept across the continent.after the impact..Passage 2.Proponents of the Younger Dryas impact.hypothesis have claimed various kinds of evidence.for the hypothesis, including deposits of the element.iridium (rare on Earth but abundant in meteorites),.microscopic diamonds (called nanodiamonds), and.magnetic particles in deposits at sites supposedly.dated to about 12,800 years ago. These claims were.sharply contested by some specialists in the relevant.fields, however, who either did not detect such.evidence or argued that the deposits had other causes.than a cosmic impact. For example, some say that.nanodiamonds are common in ordinary geological.formations, and that magnetic particles could come.from ordinary fires..Now comes what some researchers consider the.strongest attack yet on the Younger Dryas impact.hypothesis. In a paper published recently in the.Proceedings of the National Academy of Sciences,a.team led by David Meltzer, an archaeologist at.Southern Methodist University, Dallas, in Texas,.looks at the dating of 29 different sites in the.Americas, Europe, and the Middle East in which.impact advocates have reported evidence for a.cosmic collision. They include sites in which.sophisticated stone projectiles called Clovis points,.used by some of the earliest Americans to hunt.mammals beginning about 13,000 years ago, have.been found. The team argues that when the quality.and accuracy of the dating—which was based on.radiocarbon and other techniques—is examined.closely, only three of the 29 sites actually fall within.the time frame of the Younger Dryas onset, about 12,800 years ago; the rest were probably either earlier.or later by hundreds (and in one case, thousands) of.years..“The supposed Younger Dryas impact fails on.both theoretical and empirical grounds,” says.Meltzer, who adds that the popular appeal of the.hypothesis is probably due to the way that it provides.“simple explanations for complex problems.” Thus,.“giant chunks of space debris clobbering the planet.and wiping out life on Earth has undeniably broad.appeal,” Meltzer says, whereas “no one in Hollywood.makes movies” about more nuanced explanations,.such as Clovis points disappearing because early.Americans turned to other forms of stone tool.technology as the large mammals they were hunting.went extinct as a result of the changing climate or.hunting pressure..But impact proponents appear unmoved by the.new study. “We still stand fully behind the [impact.hypothesis], which is based on more than a.confluence of dates,” says Richard Firestone, a.nuclear chemist at the Lawrence Berkeley National.Laboratory in California. “Radiocarbon dating is a.perilous process,” he contends, adding that the.presence of Clovis artifacts and mammoth bones just.under the claimed iridium, nanodiamond, and.magnetic sphere deposits is a more reliable indicator.that an extraterrestrial event was responsible for their.disappearance.
Question: According to Passage 1, the team of scientists believes that the black carbonized material found in certain sedimentary layers was caused by which phenomenon following a cosmic collision?
 A. Climate cooling
 B. Mass extinctions
 C. Rapidly spreading fires
 D. Iridium deposits
Answer: C


Question:
The Venus flytrap [Dionaea muscipula] needs to know when an ideal meal is crawling across its leaves. Closing its trap requires a huge expense of energy,  and reopening the trap can take several hours, soDionaea only wants to spring closed when it's sure that the dawdling insect visiting its surface is large enough to be worth its time. The large black hairs on their lobes allow the Venus flytraps to literally feel their prey, and they act as triggers that spring thetrap closed when the proper prey makes its way across the trap. If the insect touches just one hair, the trap will not spring shut; but a large enough bug will likely touch two hairs within about twenty seconds, and that signal springs the Venus flytrap into action.We can look at this system as analogous to short-term memory. First, the flytrap encodes the information (forms the memory) that something (it doesn't know what) has touched one of its hairs. Then it stores this information for a number of 20 seconds (retains the memory) and finally retrieves this information (recalls the memory) once a second hair is touched. If a small ant takes a while to get from one hair to the next, the trap will have forgotten the first touch by the time the ant brushes up against25 the next hair. In other words, it loses the storage of the information, doesn't close, and the anthappily meanders on. How does the plant encode and store the information from the unassuming bug's encounter with the first hair? How does it30 remember the first touch in order to react upon the second?Scientists have been puzzled by these questions ever since John Burdon-Sanderson's early report on the physiology of the Venus flytrap in 1882 . A35 century later, Dieter Hodick and Andreas Sievers at the University of Bonn in Germany proposed that the flytrap stored information regarding how many hairs have been touched in the electric charge of its leaf. Their model is quite elegant in its simplicity.40 In their studies, they discovered that touching a trigger hair on the Venus flytrap causes an electric action potential [a temporary reversal in the electrical polarity of a cell membrane] that induces calcium channels to open in the trap (this 45 coupling of action potentials and the opening of calcium channels is similar to the processes that occur during communication between human neurons), thus causing a rapid increase in the concentration of calcium ions.They proposed that the trap requires a relatively high concentration of calcium in order to close and that a single action potential from just one trigger hair being touched does not reach this level. Therefore, a second hair needs to be stimulated to 55 push the calcium concentration over this threshold and spring the trap. The encoding of the information requires maintaining a high enough level of calcium so that a second increase (triggered by touching the second hair) pushes the total concentration of 60 calcium over the threshold. As the calcium ion concentrations dissipate over time, if the second touch and potential don't happen quickly, the final concentration after the second trigger won't be high enough to close the trap, and the memory is lost.65 Subsequent research supports this model. Alexander Volkov and his colleagues at Oakwood University in Alabama first demonstrated that it is indeed electricity that causes the Venus flytrap to close. To test the model they rigged up very fine70 electrodes and applied an electrical current to the open lobes of the trap. This made the trap close without any direct touch to its trigger hairs (while they didn't measure calcium levels, the current likely led to increases). When they modified this 75 experiment by altering the amount of electrical current, Volkov could determine the exact electrical charge needed for the trap to close. As long as fourteen microcoulombs-a tiny bit more than the static electricity generated by rubbing two balloons80 together-flowed between the two electrodes, the trap closed. This could come as one large burst or as a series of smaller charges within twenty seconds. If it took longer than twenty seconds to accumulate the total charge, the trap would remain open
Question: According to the passage, which statement best explains why the Venus flytrap requires a second trigger hair to be touched within a short amount of time in order for its trap to close?
 A. The second trigger produces an electrical charge that reverses the charge produced by the first trigger.
 B. The second trigger stabilizes the surge of calcium ions created by the first trigger.
 C. The second trigger prompts the calcium channels to open.
 D. The second trigger provides a necessary supplement to the calcium concentration released by the first trigger.
Answer:

Choices:
- A
- B
- C
- D

The Venus flytrap [Dionaea muscipula] needs to know when an ideal meal is crawling across its leaves. Closing its trap requires a huge expense of energy,  and reopening the trap can take several hours, soDionaea only wants to spring closed when it's sure that the dawdling insect visiting its surface is large enough to be worth its time. The large black hairs on their lobes allow the Venus flytraps to literally feel their prey, and they act as triggers that spring thetrap closed when the proper prey makes its way across the trap. If the insect touches just one hair, the trap will not spring shut; but a large enough bug will likely touch two hairs within about twenty seconds, and that signal springs the Venus flytrap into action.We can look at this system as analogous to short-term memory. First, the flytrap encodes the information (forms the memory) that something (it doesn't know what) has touched one of its hairs. Then it stores this information for a number of 20 seconds (retains the memory) and finally retrieves this information (recalls the memory) once a second hair is touched. If a small ant takes a while to get from one hair to the next, the trap will have forgotten the first touch by the time the ant brushes up against25 the next hair. In other words, it loses the storage of the information, doesn't close, and the anthappily meanders on. How does the plant encode and store the information from the unassuming bug's encounter with the first hair? How does it30 remember the first touch in order to react upon the second?Scientists have been puzzled by these questions ever since John Burdon-Sanderson's early report on the physiology of the Venus flytrap in 1882 . A35 century later, Dieter Hodick and Andreas Sievers at the University of Bonn in Germany proposed that the flytrap stored information regarding how many hairs have been touched in the electric charge of its leaf. Their model is quite elegant in its simplicity.40 In their studies, they discovered that touching a trigger hair on the Venus flytrap causes an electric action potential [a temporary reversal in the electrical polarity of a cell membrane] that induces calcium channels to open in the trap (this 45 coupling of action potentials and the opening of calcium channels is similar to the processes that occur during communication between human neurons), thus causing a rapid increase in the concentration of calcium ions.They proposed that the trap requires a relatively high concentration of calcium in order to close and that a single action potential from just one trigger hair being touched does not reach this level. Therefore, a second hair needs to be stimulated to 55 push the calcium concentration over this threshold and spring the trap. The encoding of the information requires maintaining a high enough level of calcium so that a second increase (triggered by touching the second hair) pushes the total concentration of 60 calcium over the threshold. As the calcium ion concentrations dissipate over time, if the second touch and potential don't happen quickly, the final concentration after the second trigger won't be high enough to close the trap, and the memory is lost.65 Subsequent research supports this model. Alexander Volkov and his colleagues at Oakwood University in Alabama first demonstrated that it is indeed electricity that causes the Venus flytrap to close. To test the model they rigged up very fine70 electrodes and applied an electrical current to the open lobes of the trap. This made the trap close without any direct touch to its trigger hairs (while they didn't measure calcium levels, the current likely led to increases). When they modified this 75 experiment by altering the amount of electrical current, Volkov could determine the exact electrical charge needed for the trap to close. As long as fourteen microcoulombs-a tiny bit more than the static electricity generated by rubbing two balloons80 together-flowed between the two electrodes, the trap closed. This could come as one large burst or as a series of smaller charges within twenty seconds. If it took longer than twenty seconds to accumulate the total charge, the trap would remain open
Question: According to the passage, which statement best explains why the Venus flytrap requires a second trigger hair to be touched within a short amount of time in order for its trap to close?
 A. The second trigger produces an electrical charge that reverses the charge produced by the first trigger.
 B. The second trigger stabilizes the surge of calcium ions created by the first trigger.
 C. The second trigger prompts the calcium channels to open.
 D. The second trigger provides a necessary supplement to the calcium concentration released by the first trigger.
Answer: D


Question:
Miss Grace Spivey arrived in Threestep, Georgia, in August 1938. She stepped off the train wearing a pair of thick-soled boots suitable for hiking, a navyblue dress, and a little white tam that rode the wavesof her red hair at a gravity-defying angle. August was a hellish month to step off the train in Georgia, although it was nothing, she said, compared to the 119 degrees that greeted her when she arrived one time in Timbuktu, which, she assured us, was a real 10 place in Africa. I believe her remark irritated some of the people gathered to welcome her on the burned grass alongside the tracks. When folks are sweating through their shorts, they don't like to hear that this is nothing compared to someplace else. Irritated or15 not, the majority of those present were inclined to see the arrival of the new schoolteacher in a positive light. Hard times were still upon us in 1938, but, like my momma said, "We weren't no poorer than we'd ever been," and the citizens of Threestep were in the 20 mood for a little excitement.Miss Spivey looked like just the right person to give it to them. She was, by almost anyone's standards, a woman of the world. She'd gone to boarding schools since she was six years old; she'd 25 studied French in Paris and drama in London; and during what she called a "fruitful intermission" in her formal education, she had traveled extensively in the Near East and Africa with a friend of her grandmother's, one Janet Miller, who was a medical30 doctor from Nashville, Tennessee. After her travels with Dr. Miller, Miss Spivey continued her education by attending Barnard College in New York City. She told us all that at school the first day. When my little brother Ralphord asked what did she study at35 Barnyard College, Miss Spivey explained that Barnard, which she wrote on the blackboard, was the sister school of Columbia University, of which, she expected, we all had heard.It was there, she told us, in the midst of trying to 40 find her true mission in life, that she wandered one afternoon into a lecture by the famous John Dewey, who was talking about his famous book, Democracy and Education. Professor Dewey was in his seventies by then, Miss Spivey said, but he still liked to chat45 with students after a lecture-especially female students, she added-sometimes over coffee, and see in their eyes the fire his words could kindle. It was after this lecture and subsequent coffee that Miss Spivey had marched to the Teacher's College and 50 signed up, all aflame. Two years later, she told a cheery blue-suited woman from the $\mathrm{WPA}^{1}$ that she wanted to bring democracy and education to the poorest, darkest, most remote and forgotten corner of America.55 They sent her to Threestep, Georgia.Miss Spivey paused there for questions, avoiding my brother Ralphord's eye.What we really wanted to know about-all twenty-six of us across seven grade levels in the one 60 room-was the pearly white button hanging on a string in front of the blackboard behind the teacher's desk up front. That button on a string was something new. When Mavis Davis (the only bona fide seventh grader, at age thirteen) asked what it was for, Miss65 Spivey gave the string a tug, and to our astonishment, the whole world-or at least a wrinkled map of it-unfolded before our eyes. Her predecessor, Miss Chandler, had never once made use of that map, which was older than our fathers, and until that70 moment, not a one of us knew it was there.Miss Spivey showed us on the map how she and Dr. Janet Miller had sailed across the Atlantic Ocean and past the Rock of Gibraltar into theMediterranean Sea. Using the end of a ruler, she75 gently tapped such places as Morocco and Tunis and Algiers to mark their route along the top of Africa. They spent twenty hours on the train to Baghdad, she said, swathed in veils against the sand that crept in every crack and crevice.80 "And can you guess what we saw from the train?" Miss Spivey asked. We could not. "Camels!" she said. "We saw a whole caravan of camels." She looked around the room, waiting for us to be amazed and delighted at the thought.85 We all hung there for a minute, thinking hard, until Mavis Davis spoke up."She means like the three kings rode to Bethlehem," Mavis said, and she folded her hands smugly on her seventh-grade desk in the back of the 90 room.Miss Spivey made a mistake right then. Instead of beaming upon Mavis the kind of congratulatory smile that old Miss Chandler would have bestowed on her for having enlightened the rest of us, Miss95 Spivey simply said, "That's right."1 The Works Progress Administration (WPA) was a government agency that hired people for public and cultural development projects and services.
Question: In the passage, when Miss Spivey announces that she had seen camels, the students' reaction suggests that they are
 A. delighted.
 B. fascinated.
 C. baffled.
 D. worried.
Answer:

Choices:
- A
- B
- C
- D

Miss Grace Spivey arrived in Threestep, Georgia, in August 1938. She stepped off the train wearing a pair of thick-soled boots suitable for hiking, a navyblue dress, and a little white tam that rode the wavesof her red hair at a gravity-defying angle. August was a hellish month to step off the train in Georgia, although it was nothing, she said, compared to the 119 degrees that greeted her when she arrived one time in Timbuktu, which, she assured us, was a real 10 place in Africa. I believe her remark irritated some of the people gathered to welcome her on the burned grass alongside the tracks. When folks are sweating through their shorts, they don't like to hear that this is nothing compared to someplace else. Irritated or15 not, the majority of those present were inclined to see the arrival of the new schoolteacher in a positive light. Hard times were still upon us in 1938, but, like my momma said, "We weren't no poorer than we'd ever been," and the citizens of Threestep were in the 20 mood for a little excitement.Miss Spivey looked like just the right person to give it to them. She was, by almost anyone's standards, a woman of the world. She'd gone to boarding schools since she was six years old; she'd 25 studied French in Paris and drama in London; and during what she called a "fruitful intermission" in her formal education, she had traveled extensively in the Near East and Africa with a friend of her grandmother's, one Janet Miller, who was a medical30 doctor from Nashville, Tennessee. After her travels with Dr. Miller, Miss Spivey continued her education by attending Barnard College in New York City. She told us all that at school the first day. When my little brother Ralphord asked what did she study at35 Barnyard College, Miss Spivey explained that Barnard, which she wrote on the blackboard, was the sister school of Columbia University, of which, she expected, we all had heard.It was there, she told us, in the midst of trying to 40 find her true mission in life, that she wandered one afternoon into a lecture by the famous John Dewey, who was talking about his famous book, Democracy and Education. Professor Dewey was in his seventies by then, Miss Spivey said, but he still liked to chat45 with students after a lecture-especially female students, she added-sometimes over coffee, and see in their eyes the fire his words could kindle. It was after this lecture and subsequent coffee that Miss Spivey had marched to the Teacher's College and 50 signed up, all aflame. Two years later, she told a cheery blue-suited woman from the $\mathrm{WPA}^{1}$ that she wanted to bring democracy and education to the poorest, darkest, most remote and forgotten corner of America.55 They sent her to Threestep, Georgia.Miss Spivey paused there for questions, avoiding my brother Ralphord's eye.What we really wanted to know about-all twenty-six of us across seven grade levels in the one 60 room-was the pearly white button hanging on a string in front of the blackboard behind the teacher's desk up front. That button on a string was something new. When Mavis Davis (the only bona fide seventh grader, at age thirteen) asked what it was for, Miss65 Spivey gave the string a tug, and to our astonishment, the whole world-or at least a wrinkled map of it-unfolded before our eyes. Her predecessor, Miss Chandler, had never once made use of that map, which was older than our fathers, and until that70 moment, not a one of us knew it was there.Miss Spivey showed us on the map how she and Dr. Janet Miller had sailed across the Atlantic Ocean and past the Rock of Gibraltar into theMediterranean Sea. Using the end of a ruler, she75 gently tapped such places as Morocco and Tunis and Algiers to mark their route along the top of Africa. They spent twenty hours on the train to Baghdad, she said, swathed in veils against the sand that crept in every crack and crevice.80 "And can you guess what we saw from the train?" Miss Spivey asked. We could not. "Camels!" she said. "We saw a whole caravan of camels." She looked around the room, waiting for us to be amazed and delighted at the thought.85 We all hung there for a minute, thinking hard, until Mavis Davis spoke up."She means like the three kings rode to Bethlehem," Mavis said, and she folded her hands smugly on her seventh-grade desk in the back of the 90 room.Miss Spivey made a mistake right then. Instead of beaming upon Mavis the kind of congratulatory smile that old Miss Chandler would have bestowed on her for having enlightened the rest of us, Miss95 Spivey simply said, "That's right."1 The Works Progress Administration (WPA) was a government agency that hired people for public and cultural development projects and services.
Question: In the passage, when Miss Spivey announces that she had seen camels, the students' reaction suggests that they are
 A. delighted.
 B. fascinated.
 C. baffled.
 D. worried.
Answer: C


Question:
Passage 1.After years of hard work by conservationists.throughout Asia, a new study brings good news for.the world’s wild tigers. According to a new report by.the World Wildlife Fund (WWF), the number of.tigers living in the wild may have been slowly rising.over the last several years. If continued surveys prove.this to be true, this would mark the first time in more.than a century that tiger populations have grown..In a study compiling surveys taken across Asia,.researchers at the WWF found that there are at least 3,890 tigers living in the wild today—a considerable.increase from the 3,200 recorded in 2010. The study.suggests that the commitment to and success of.conservation programs in some countries have.contributed to the overall growth of the global tiger.population..“It’s a positive trend,” Ginette Hemley, the WWF’s.senior vice president of wildlife conservation, says..“We’re cautiously hopeful.”.Counting wild tigers, however, isn’t easy. While.tens of thousands of tigers once roamed Asia from.Turkey to Indonesia, their habitats have become tiny.and scattered during the last century. Wild tigers are.notoriously elusive, preferring to hide out in hard-to-.reach places in jungle undergrowth and high.mountains..Combined with their low numbers, these factors.can make them difficult to keep track of, which can.leave some uncertainty as to whether the populations.are truly on the rise. The increased numbers may in.part reflect better surveying methods..Additionally, while the global number of wild.tigers appears to have gone up, a country-by-country.analysis is more sobering. Though several countries.including India, Nepal, Bhutan and Russia may have.gone up in recent years, others have seen tigers.disappear thanks to poaching and habitat loss..Passage 2.Photographic capture-recapture and large-scale.occupancy modeling are now used to estimate tiger.numbers and range in several countries across Asia..(Scientists who study other elusive carnivores with.unique body markings, including African wild dogs.and wolverines, are also employing these approaches.).Yet on the whole, although the science of tiger.population assessment has rapidly progressed, its.adoption by governmental and nongovernmental.conservation agencies has not, whether because of a.lack of understanding of or comfort with the new.methods or because the old methods cast a more.flattering light on their efforts..A recent example illustrates just how insidious.reliance on outdated tools is. In April the WWF and.the Global Tiger Forum announced to great fanfare.that the planet’s wild tiger population was at last on.the rise, numbering 3,890 individuals. These groups.aim to increase the number of tigers to 6,000 by 2022..But their tally, based on official estimates, relied on.flawed methodologies, including the use of.statistically weak extrapolations from tiger.photographs and field counts of spoor.^1 And their.goal for population growth far exceeds what one.would expect to realize on the basis of studies carried.out using more rigorous techniques. Furthermore,.apart from the increases in tigers in a few reserves in.India and parts of Thailand, there are no convincing.data to show that populations are recovering in the.rest of Southeast Asia or Russia. Indeed, countries.such as Cambodia, Vietnam and China have lost their.viable tiger populations in recent years—losses.masked by any single global tiger number..Speculative tiger numbers for countries and.regions undermine efforts to save tigers by distracting.conservationists and the public from what should be.our top priority: guarding and growing the source.populations.^2 In a way, the overall number of wild.tigers, if we could even get an accurate count, may not.matter. The source populations are the ones we need.to monitor vigilantly, using the best science available.to track their numbers. Only with reliable counts can.we set realistic goals for future growth, develop.suitable strategies for meeting those goals and.measure the impact of our conservation efforts..(^1) Animal droppings.(^2) Animals located in areas with suitable conditions for reproduction.to take place.History shows that scientific progress can stall.from lack of understanding, institutional inertia and.political considerations for decades or even centuries..But as the world enters into the sixth mass extinction.of wild species, we simply cannot afford to divorce.conservation practices from sound science if we are to.have any hope of saving a wildlife icon like the.majestic tiger.
Question: Which choice best states the relationship between the two passages?
 A. Passage 2 compares and critiques the conservation solutions recommended in Passage 1.
 B. Passage 2 questions the professional credibility of the scientists profiled in Passage 1.
 C. Passage 2 suggests several applications of the conclusions reached in Passage 1.
 D. Passage 2 challenges the reliability of research results discussed in Passage 1.
Answer:

Choices:
- A
- B
- C
- D

Passage 1.After years of hard work by conservationists.throughout Asia, a new study brings good news for.the world’s wild tigers. According to a new report by.the World Wildlife Fund (WWF), the number of.tigers living in the wild may have been slowly rising.over the last several years. If continued surveys prove.this to be true, this would mark the first time in more.than a century that tiger populations have grown..In a study compiling surveys taken across Asia,.researchers at the WWF found that there are at least 3,890 tigers living in the wild today—a considerable.increase from the 3,200 recorded in 2010. The study.suggests that the commitment to and success of.conservation programs in some countries have.contributed to the overall growth of the global tiger.population..“It’s a positive trend,” Ginette Hemley, the WWF’s.senior vice president of wildlife conservation, says..“We’re cautiously hopeful.”.Counting wild tigers, however, isn’t easy. While.tens of thousands of tigers once roamed Asia from.Turkey to Indonesia, their habitats have become tiny.and scattered during the last century. Wild tigers are.notoriously elusive, preferring to hide out in hard-to-.reach places in jungle undergrowth and high.mountains..Combined with their low numbers, these factors.can make them difficult to keep track of, which can.leave some uncertainty as to whether the populations.are truly on the rise. The increased numbers may in.part reflect better surveying methods..Additionally, while the global number of wild.tigers appears to have gone up, a country-by-country.analysis is more sobering. Though several countries.including India, Nepal, Bhutan and Russia may have.gone up in recent years, others have seen tigers.disappear thanks to poaching and habitat loss..Passage 2.Photographic capture-recapture and large-scale.occupancy modeling are now used to estimate tiger.numbers and range in several countries across Asia..(Scientists who study other elusive carnivores with.unique body markings, including African wild dogs.and wolverines, are also employing these approaches.).Yet on the whole, although the science of tiger.population assessment has rapidly progressed, its.adoption by governmental and nongovernmental.conservation agencies has not, whether because of a.lack of understanding of or comfort with the new.methods or because the old methods cast a more.flattering light on their efforts..A recent example illustrates just how insidious.reliance on outdated tools is. In April the WWF and.the Global Tiger Forum announced to great fanfare.that the planet’s wild tiger population was at last on.the rise, numbering 3,890 individuals. These groups.aim to increase the number of tigers to 6,000 by 2022..But their tally, based on official estimates, relied on.flawed methodologies, including the use of.statistically weak extrapolations from tiger.photographs and field counts of spoor.^1 And their.goal for population growth far exceeds what one.would expect to realize on the basis of studies carried.out using more rigorous techniques. Furthermore,.apart from the increases in tigers in a few reserves in.India and parts of Thailand, there are no convincing.data to show that populations are recovering in the.rest of Southeast Asia or Russia. Indeed, countries.such as Cambodia, Vietnam and China have lost their.viable tiger populations in recent years—losses.masked by any single global tiger number..Speculative tiger numbers for countries and.regions undermine efforts to save tigers by distracting.conservationists and the public from what should be.our top priority: guarding and growing the source.populations.^2 In a way, the overall number of wild.tigers, if we could even get an accurate count, may not.matter. The source populations are the ones we need.to monitor vigilantly, using the best science available.to track their numbers. Only with reliable counts can.we set realistic goals for future growth, develop.suitable strategies for meeting those goals and.measure the impact of our conservation efforts..(^1) Animal droppings.(^2) Animals located in areas with suitable conditions for reproduction.to take place.History shows that scientific progress can stall.from lack of understanding, institutional inertia and.political considerations for decades or even centuries..But as the world enters into the sixth mass extinction.of wild species, we simply cannot afford to divorce.conservation practices from sound science if we are to.have any hope of saving a wildlife icon like the.majestic tiger.
Question: Which choice best states the relationship between the two passages?
 A. Passage 2 compares and critiques the conservation solutions recommended in Passage 1.
 B. Passage 2 questions the professional credibility of the scientists profiled in Passage 1.
 C. Passage 2 suggests several applications of the conclusions reached in Passage 1.
 D. Passage 2 challenges the reliability of research results discussed in Passage 1.
Answer: D


Question:
Voters need to understand the prosaic details of.complex policies. Most have staked out positions on.these issues, but they are not often reasoned.positions, which take hard intellectual work. Most.citizens opt instead for simplistic explanations,.assuming wrongly that they comprehend the nuances.of issues..Psychological scientists have a name for this.easy, automatic, simplistic thinking: the illusion of.explanatory depth. We strongly believe that we.understand complex matters, when in fact we are.clueless, and these false and extreme beliefs.shape our preferences, judgments, and actions—.including our votes..Is it possible to shake such deep-rooted.convictions? That’s the question that Philip.Fernbach, a psychological scientist at the University.of Colorado’s Leeds School of Business, wanted to.explore. Fernbach and his colleagues wondered if.forcing people to explain complex policies in.detail—not cheerleading for a position but really.considering the mechanics of implementation—.might force them to confront their ignorance and.thus weaken their extremist stands on issues. They.ran a series of lab experiments to test this idea..They started by recruiting a group of volunteers in.their 30s—Democrats, Republicans, and.Independents—and asking them to state their.positions on a variety of issues, from a national flat.tax to a cap-and-trade system for carbon emissions..The volunteers indicated how strongly they felt about.each issue and also rated their own understanding of.the issues. Then the volunteers were instructed to.write elaborate explanations of two issues. If the issue.was cap and trade, for example, they would first.explain precisely what cap and trade means, how it is.implemented, whom it benefits and whom it could.hurt, the sources of carbon emissions, and so forth..They were not asked for value judgments about the.policy or about the environment or business, but.only for a highly detailed description of the.mechanics of the policy in action..Let’s be honest: Most of us never do this..Fernbach’s idea was that such an exercise would.force many to realize just how little they really know.about cap and trade, and confronted with their own.ignorance, they would dampen their own.enthusiasm. They would be humbled and as a result.take less extreme positions. And that’s just what.happened. Trying—and failing—to explain complex.policies undermined the extremists’ illusions about.being well-informed. They became more moderate in.their views as a result..Being forced to articulate the nuts and bolts of a.policy is not the same as trying to sell that policy..In fact, talking about one’s views can often.strengthen them. Fernbach believes it’s the slow,.cognitive work—the deliberate analysis—that.changes people’s judgments, but he wanted to check.this in another experiment. This one was very similar.to the first, but some volunteers, instead of.explaining a policy, merely listed reasons for liking it..The results were clear. Those who simply listed.reasons for their positions—articulating their.values—were less shaken in their views. They.continued to think they understood the policies in.their complexity, and, notably, they remained.extreme in their passion for their positions..Polarization tends to reinforce itself. People are.unaware of their own ignorance, and they seek out.information that bolsters their views, often without.knowing it. They also process new information in.biased ways, and they hang out with people like.themselves. All of these psychological forces increase.political extremism, and no simple measure will.change that. But forcing the candidates to provide.concrete and elaborate plans might be a start; it gives.citizens a starting place.
Question: Based on the passage, which action would most likely reducepolitical extremism among the citizenry?
 A. Forming organized groups of people who share their most deeply held convictions
 B. Requiring that politicians explain their proposed policies in detail before an election is held
 C. Promoting awareness of charities that provide opportunities to donate money to worthy but underfunded causes
 D. Hosting events that encourage people who hold opposing points of view to interact with one another
Answer:

Choices:
- A
- B
- C
- D

Voters need to understand the prosaic details of.complex policies. Most have staked out positions on.these issues, but they are not often reasoned.positions, which take hard intellectual work. Most.citizens opt instead for simplistic explanations,.assuming wrongly that they comprehend the nuances.of issues..Psychological scientists have a name for this.easy, automatic, simplistic thinking: the illusion of.explanatory depth. We strongly believe that we.understand complex matters, when in fact we are.clueless, and these false and extreme beliefs.shape our preferences, judgments, and actions—.including our votes..Is it possible to shake such deep-rooted.convictions? That’s the question that Philip.Fernbach, a psychological scientist at the University.of Colorado’s Leeds School of Business, wanted to.explore. Fernbach and his colleagues wondered if.forcing people to explain complex policies in.detail—not cheerleading for a position but really.considering the mechanics of implementation—.might force them to confront their ignorance and.thus weaken their extremist stands on issues. They.ran a series of lab experiments to test this idea..They started by recruiting a group of volunteers in.their 30s—Democrats, Republicans, and.Independents—and asking them to state their.positions on a variety of issues, from a national flat.tax to a cap-and-trade system for carbon emissions..The volunteers indicated how strongly they felt about.each issue and also rated their own understanding of.the issues. Then the volunteers were instructed to.write elaborate explanations of two issues. If the issue.was cap and trade, for example, they would first.explain precisely what cap and trade means, how it is.implemented, whom it benefits and whom it could.hurt, the sources of carbon emissions, and so forth..They were not asked for value judgments about the.policy or about the environment or business, but.only for a highly detailed description of the.mechanics of the policy in action..Let’s be honest: Most of us never do this..Fernbach’s idea was that such an exercise would.force many to realize just how little they really know.about cap and trade, and confronted with their own.ignorance, they would dampen their own.enthusiasm. They would be humbled and as a result.take less extreme positions. And that’s just what.happened. Trying—and failing—to explain complex.policies undermined the extremists’ illusions about.being well-informed. They became more moderate in.their views as a result..Being forced to articulate the nuts and bolts of a.policy is not the same as trying to sell that policy..In fact, talking about one’s views can often.strengthen them. Fernbach believes it’s the slow,.cognitive work—the deliberate analysis—that.changes people’s judgments, but he wanted to check.this in another experiment. This one was very similar.to the first, but some volunteers, instead of.explaining a policy, merely listed reasons for liking it..The results were clear. Those who simply listed.reasons for their positions—articulating their.values—were less shaken in their views. They.continued to think they understood the policies in.their complexity, and, notably, they remained.extreme in their passion for their positions..Polarization tends to reinforce itself. People are.unaware of their own ignorance, and they seek out.information that bolsters their views, often without.knowing it. They also process new information in.biased ways, and they hang out with people like.themselves. All of these psychological forces increase.political extremism, and no simple measure will.change that. But forcing the candidates to provide.concrete and elaborate plans might be a start; it gives.citizens a starting place.
Question: Based on the passage, which action would most likely reducepolitical extremism among the citizenry?
 A. Forming organized groups of people who share their most deeply held convictions
 B. Requiring that politicians explain their proposed policies in detail before an election is held
 C. Promoting awareness of charities that provide opportunities to donate money to worthy but underfunded causes
 D. Hosting events that encourage people who hold opposing points of view to interact with one another
Answer: B


Question:
Unlike the gold which needed nothing, and must be worshipped in close-locked solitude - which was hidden away from the daylight, was deaf to the song  of birds, and started to no human tones-Eppie was a 5 creature of endless claims and ever-growing desires, seeking and loving sunshine, and living sounds, and living movements; making trial of everything, with trust in new joy, and stirring the human kindness in all eyes that looked on her. The gold had kept his10 thoughts in an ever-repeated circle, leading to nothing beyond itself; but Eppie was an object compacted of changes and hopes that forced his thoughts onward, and carried them far away from their old eager pacing towards the same blank15 limit-carried them away to the new things that would come with the coming years, when Eppie would have learned to understand how her father Silas cared for her; and made him look for images of that time in the ties and charities that bound together 20 the families of his neighbors. The gold had asked that he should sit weaving longer and longer, deafened and blinded more and more to all things except the monotony of his loom and the repetition of his web; but Eppie called him away from his weaving, and25 made him think all its pauses a holiday, reawakening his senses with her fresh life, even to the old winter-flies that came crawling forth in the early spring sunshine, and warming him into joy because she had joy.30 And when the sunshine grew strong and lasting, so that the buttercups were thick in the meadows, Silas might be seen in the sunny mid-day, or in the late afternoon when the shadows were lengthening under the hedgerows, strolling out with uncovered35 head to carry Eppie beyond the Stone-pits to where the flowers grew, till they reached some favorite bank where he could sit down, while Eppie toddled to pluck the flowers, and make remarks to the winged things that murmured happily above the bright40 petals, calling "Dad-dad's" attention continually by bringing him the flowers. Then she would turn her ear to some sudden bird-note, and Silas learned to please her by making signs of hushed stillness, that they might listen for the note to come again: so that45 when it came, she set up her small back and laughed with gurgling triumph. Sitting on the banks in this way, Silas began to look for the once familiar herbs again; and as the leaves, with their unchanged outline and markings, lay on his palm, there was a sense of 50 crowding remembrances from which he turned away timidly, taking refuge in Eppie's little world, that lay lightly on his enfeebled spirit. As the child's mind was growing into knowledge, his mind was growing into memory: as her lifeunfolded, his soul, long stupefied in a cold narrow prison, was unfolding too, and trembling gradually into full consciousness.It was an influence which must gather force with every new year: the tones that stirred Silas' heart60 grew articulate, and called for more distinct answers; shapes and sounds grew clearer for Eppie's eyes and ears, and there was more that "Dad-dad" was imperatively required to notice and account for. Also, by the time Eppie was three years old, she65 developed a fine capacity for mischief, and for devising ingenious ways of being troublesome, which found much exercise, not only for Silas' patience, but for his watchfulness and penetration. Sorely was poor Silas puzzled on such occasions by the incompatible 70 demands of love.
Question: Which choice best describes a major theme of the passage?
 A. The corrupting influence of a materialistic society
 B. The moral purity of young children
 C. The bittersweet brevity of childhood naïveté
 D. The restorative power of parental love
Answer:

Choices:
- A
- B
- C
- D

Unlike the gold which needed nothing, and must be worshipped in close-locked solitude - which was hidden away from the daylight, was deaf to the song  of birds, and started to no human tones-Eppie was a 5 creature of endless claims and ever-growing desires, seeking and loving sunshine, and living sounds, and living movements; making trial of everything, with trust in new joy, and stirring the human kindness in all eyes that looked on her. The gold had kept his10 thoughts in an ever-repeated circle, leading to nothing beyond itself; but Eppie was an object compacted of changes and hopes that forced his thoughts onward, and carried them far away from their old eager pacing towards the same blank15 limit-carried them away to the new things that would come with the coming years, when Eppie would have learned to understand how her father Silas cared for her; and made him look for images of that time in the ties and charities that bound together 20 the families of his neighbors. The gold had asked that he should sit weaving longer and longer, deafened and blinded more and more to all things except the monotony of his loom and the repetition of his web; but Eppie called him away from his weaving, and25 made him think all its pauses a holiday, reawakening his senses with her fresh life, even to the old winter-flies that came crawling forth in the early spring sunshine, and warming him into joy because she had joy.30 And when the sunshine grew strong and lasting, so that the buttercups were thick in the meadows, Silas might be seen in the sunny mid-day, or in the late afternoon when the shadows were lengthening under the hedgerows, strolling out with uncovered35 head to carry Eppie beyond the Stone-pits to where the flowers grew, till they reached some favorite bank where he could sit down, while Eppie toddled to pluck the flowers, and make remarks to the winged things that murmured happily above the bright40 petals, calling "Dad-dad's" attention continually by bringing him the flowers. Then she would turn her ear to some sudden bird-note, and Silas learned to please her by making signs of hushed stillness, that they might listen for the note to come again: so that45 when it came, she set up her small back and laughed with gurgling triumph. Sitting on the banks in this way, Silas began to look for the once familiar herbs again; and as the leaves, with their unchanged outline and markings, lay on his palm, there was a sense of 50 crowding remembrances from which he turned away timidly, taking refuge in Eppie's little world, that lay lightly on his enfeebled spirit. As the child's mind was growing into knowledge, his mind was growing into memory: as her lifeunfolded, his soul, long stupefied in a cold narrow prison, was unfolding too, and trembling gradually into full consciousness.It was an influence which must gather force with every new year: the tones that stirred Silas' heart60 grew articulate, and called for more distinct answers; shapes and sounds grew clearer for Eppie's eyes and ears, and there was more that "Dad-dad" was imperatively required to notice and account for. Also, by the time Eppie was three years old, she65 developed a fine capacity for mischief, and for devising ingenious ways of being troublesome, which found much exercise, not only for Silas' patience, but for his watchfulness and penetration. Sorely was poor Silas puzzled on such occasions by the incompatible 70 demands of love.
Question: Which choice best describes a major theme of the passage?
 A. The corrupting influence of a materialistic society
 B. The moral purity of young children
 C. The bittersweet brevity of childhood naïveté
 D. The restorative power of parental love
Answer: D


Question:
\section{Passage 1}"Pathogens are acquiring resistance faster than we can introduce new antibiotics, and this is causing a human health crisis," says biochemist Kim Lewis of  Northeastern University.Lewis is part of a team that recently unveiled a promising antibiotic, born from a new way to tap the powers of soil microorganisms. In animal tests, teixobactin proved effective at killing off a wide variety of disease-causing bacteria-even those thathave developed immunity to other drugs. The scientists' best efforts to create mutant bacteria with resistance to the drug failed, meaning teixobactin could function effectively for decades before pathogens naturally evolve resistance to it.Natural microbial substances from soil bacteria and fungi have been at the root of most antibiotic drug development during the past century. But only about one percent of these organisms can be grown in a lab. The rest, in staggering numbers, haveremained uncultured and of limited use to medical science, until now. "Instead of trying to figure out the ideal conditions for each and every one of the millions of organisms out there in the environment, to allow them to grow in the lab, we simply growthem in their natural environment where they already have the conditions they need for growth," Lewis says.To do this, the team designed a gadget that sandwiches a soil sample between two membranes,each perforated with pores that allow molecules like nutrients to diffuse through but don't allow the passage of cells. "We just use it to trick the bacteria into thinking that they are in their natural environment," Lewis says.The team isolated 10,000 strains of uncultured soil bacteria and prepared extracts from them that could be tested against nasty pathogenic bacteria.Teixobactin emerged as the most promising drug.Mice infected with bacteria that cause upper  respiratory tract infections (including Staphylococcus aureus and Streptococcus pneumoniae) were treated with teixobactin, and the drug knocked out the infections with no noticeable toxic effects.It's likely that teixobactin is effective because of  the way it targets disease: The drug breaks down bacterial cell walls by attacking the lipid molecules that the cell creates organically. Many other antibiotics target the bacteria's proteins, and the genes that encode those proteins can mutate to 50 produce different structures.\section{Passage 2}Many good antibiotic families-penicillin, streptomycin, tetracycline-come from soil fungi and bacteria and it has long been suspected that, if we could grow more types of bacteria from soil-or55 from exotic environments, such as deep oceans-then we might find new natural antibiotics. In a recent study, researchers [Kim Lewis and others] found that they could isolate and grow individual soil bacteria-including types that can't normally be60 grown in the laboratory-in soil itself, which supplied critical nutrients and minerals. Once the bacteria reached a critical mass they could be transferred to the lab and their cultivation continued. This simple and elegant methodology is their most 65 important finding to my mind, for it opens a gateway to cultivating a wealth of potentially antibioticproducing bacteria that have never been grown before.The first new antibiotic that they've found by this 70 approach, teixobactin, from a bacterium called Eleftheria terrae, is less exciting to my mind, though it doesn't look bad. Teixobactin killed Gram-positive bacteria, such as S. aureus, in the laboratory, and cured experimental infection in mice. It also killed 75 the tuberculosis bacterium, which is important because there is a real problem with resistant tuberculosis in the developing world. It was also difficult to select teixobactin resistance.So, what are my caveats? Well, I see three. First, 80 teixobactin isn't a potential panacea. It doesn't kill the Gram-negative opportunists as it is too big to cross their complex cell wall. Secondly, scaling to commercial manufacture will be challenging, since the bacteria making the antibiotic are so difficult to85 grow. And, thirdly, it's early days yet. As with any antibiotic, teixobactin now faces the long haul of clinical trials: Phase I to see what dose you can safely give the patient, Phase II to see if it cures infections, and Phase III to compare its efficacy to that of 90 "standard of care treatment." That's going to take five years and $\pounds 500$ million and these are numbers we must find ways to reduce (while not compromising safety) if we're to keep ahead of bacteria, which can evolve far more swiftly and cheaply.
Question: Which choice best describes the relationship between Passage 1 and Passage 2?
 A. Passage 2 offers an evaluation of the significance of the research discussed in Passage 1.
 B. Passage 2 suggests a modification to the methodology described in Passage 1.
 C. Passage 2 uses concrete examples to illustrate concepts considered in Passage 1.
 D. Passage 2 takes a dismissive stance regarding the findings mentioned in Passage 1.
Answer:

Choices:
- A
- B
- C
- D

\section{Passage 1}"Pathogens are acquiring resistance faster than we can introduce new antibiotics, and this is causing a human health crisis," says biochemist Kim Lewis of  Northeastern University.Lewis is part of a team that recently unveiled a promising antibiotic, born from a new way to tap the powers of soil microorganisms. In animal tests, teixobactin proved effective at killing off a wide variety of disease-causing bacteria-even those thathave developed immunity to other drugs. The scientists' best efforts to create mutant bacteria with resistance to the drug failed, meaning teixobactin could function effectively for decades before pathogens naturally evolve resistance to it.Natural microbial substances from soil bacteria and fungi have been at the root of most antibiotic drug development during the past century. But only about one percent of these organisms can be grown in a lab. The rest, in staggering numbers, haveremained uncultured and of limited use to medical science, until now. "Instead of trying to figure out the ideal conditions for each and every one of the millions of organisms out there in the environment, to allow them to grow in the lab, we simply growthem in their natural environment where they already have the conditions they need for growth," Lewis says.To do this, the team designed a gadget that sandwiches a soil sample between two membranes,each perforated with pores that allow molecules like nutrients to diffuse through but don't allow the passage of cells. "We just use it to trick the bacteria into thinking that they are in their natural environment," Lewis says.The team isolated 10,000 strains of uncultured soil bacteria and prepared extracts from them that could be tested against nasty pathogenic bacteria.Teixobactin emerged as the most promising drug.Mice infected with bacteria that cause upper  respiratory tract infections (including Staphylococcus aureus and Streptococcus pneumoniae) were treated with teixobactin, and the drug knocked out the infections with no noticeable toxic effects.It's likely that teixobactin is effective because of  the way it targets disease: The drug breaks down bacterial cell walls by attacking the lipid molecules that the cell creates organically. Many other antibiotics target the bacteria's proteins, and the genes that encode those proteins can mutate to 50 produce different structures.\section{Passage 2}Many good antibiotic families-penicillin, streptomycin, tetracycline-come from soil fungi and bacteria and it has long been suspected that, if we could grow more types of bacteria from soil-or55 from exotic environments, such as deep oceans-then we might find new natural antibiotics. In a recent study, researchers [Kim Lewis and others] found that they could isolate and grow individual soil bacteria-including types that can't normally be60 grown in the laboratory-in soil itself, which supplied critical nutrients and minerals. Once the bacteria reached a critical mass they could be transferred to the lab and their cultivation continued. This simple and elegant methodology is their most 65 important finding to my mind, for it opens a gateway to cultivating a wealth of potentially antibioticproducing bacteria that have never been grown before.The first new antibiotic that they've found by this 70 approach, teixobactin, from a bacterium called Eleftheria terrae, is less exciting to my mind, though it doesn't look bad. Teixobactin killed Gram-positive bacteria, such as S. aureus, in the laboratory, and cured experimental infection in mice. It also killed 75 the tuberculosis bacterium, which is important because there is a real problem with resistant tuberculosis in the developing world. It was also difficult to select teixobactin resistance.So, what are my caveats? Well, I see three. First, 80 teixobactin isn't a potential panacea. It doesn't kill the Gram-negative opportunists as it is too big to cross their complex cell wall. Secondly, scaling to commercial manufacture will be challenging, since the bacteria making the antibiotic are so difficult to85 grow. And, thirdly, it's early days yet. As with any antibiotic, teixobactin now faces the long haul of clinical trials: Phase I to see what dose you can safely give the patient, Phase II to see if it cures infections, and Phase III to compare its efficacy to that of 90 "standard of care treatment." That's going to take five years and $\pounds 500$ million and these are numbers we must find ways to reduce (while not compromising safety) if we're to keep ahead of bacteria, which can evolve far more swiftly and cheaply.
Question: Which choice best describes the relationship between Passage 1 and Passage 2?
 A. Passage 2 offers an evaluation of the significance of the research discussed in Passage 1.
 B. Passage 2 suggests a modification to the methodology described in Passage 1.
 C. Passage 2 uses concrete examples to illustrate concepts considered in Passage 1.
 D. Passage 2 takes a dismissive stance regarding the findings mentioned in Passage 1.
Answer: A


Question:
Passage 1.After years of hard work by conservationists.throughout Asia, a new study brings good news for.the world’s wild tigers. According to a new report by.the World Wildlife Fund (WWF), the number of.tigers living in the wild may have been slowly rising.over the last several years. If continued surveys prove.this to be true, this would mark the first time in more.than a century that tiger populations have grown..In a study compiling surveys taken across Asia,.researchers at the WWF found that there are at least 3,890 tigers living in the wild today—a considerable.increase from the 3,200 recorded in 2010. The study.suggests that the commitment to and success of.conservation programs in some countries have.contributed to the overall growth of the global tiger.population..“It’s a positive trend,” Ginette Hemley, the WWF’s.senior vice president of wildlife conservation, says..“We’re cautiously hopeful.”.Counting wild tigers, however, isn’t easy. While.tens of thousands of tigers once roamed Asia from.Turkey to Indonesia, their habitats have become tiny.and scattered during the last century. Wild tigers are.notoriously elusive, preferring to hide out in hard-to-.reach places in jungle undergrowth and high.mountains..Combined with their low numbers, these factors.can make them difficult to keep track of, which can.leave some uncertainty as to whether the populations.are truly on the rise. The increased numbers may in.part reflect better surveying methods..Additionally, while the global number of wild.tigers appears to have gone up, a country-by-country.analysis is more sobering. Though several countries.including India, Nepal, Bhutan and Russia may have.gone up in recent years, others have seen tigers.disappear thanks to poaching and habitat loss..Passage 2.Photographic capture-recapture and large-scale.occupancy modeling are now used to estimate tiger.numbers and range in several countries across Asia..(Scientists who study other elusive carnivores with.unique body markings, including African wild dogs.and wolverines, are also employing these approaches.).Yet on the whole, although the science of tiger.population assessment has rapidly progressed, its.adoption by governmental and nongovernmental.conservation agencies has not, whether because of a.lack of understanding of or comfort with the new.methods or because the old methods cast a more.flattering light on their efforts..A recent example illustrates just how insidious.reliance on outdated tools is. In April the WWF and.the Global Tiger Forum announced to great fanfare.that the planet’s wild tiger population was at last on.the rise, numbering 3,890 individuals. These groups.aim to increase the number of tigers to 6,000 by 2022..But their tally, based on official estimates, relied on.flawed methodologies, including the use of.statistically weak extrapolations from tiger.photographs and field counts of spoor.^1 And their.goal for population growth far exceeds what one.would expect to realize on the basis of studies carried.out using more rigorous techniques. Furthermore,.apart from the increases in tigers in a few reserves in.India and parts of Thailand, there are no convincing.data to show that populations are recovering in the.rest of Southeast Asia or Russia. Indeed, countries.such as Cambodia, Vietnam and China have lost their.viable tiger populations in recent years—losses.masked by any single global tiger number..Speculative tiger numbers for countries and.regions undermine efforts to save tigers by distracting.conservationists and the public from what should be.our top priority: guarding and growing the source.populations.^2 In a way, the overall number of wild.tigers, if we could even get an accurate count, may not.matter. The source populations are the ones we need.to monitor vigilantly, using the best science available.to track their numbers. Only with reliable counts can.we set realistic goals for future growth, develop.suitable strategies for meeting those goals and.measure the impact of our conservation efforts..(^1) Animal droppings.(^2) Animals located in areas with suitable conditions for reproduction.to take place.History shows that scientific progress can stall.from lack of understanding, institutional inertia and.political considerations for decades or even centuries..But as the world enters into the sixth mass extinction.of wild species, we simply cannot afford to divorce.conservation practices from sound science if we are to.have any hope of saving a wildlife icon like the.majestic tiger.
Question: According to Passage 1, counting wild tigers is difficult because tigers
 A. move extremely quickly from one location to another.
 B. reside in environments that are relatively inaccessible to humans.
 C. bear a superficial resemblance to other related species.
 D. exhibit behavior that is potentially threatening to humans.
Answer:

Choices:
- A
- B
- C
- D

Passage 1.After years of hard work by conservationists.throughout Asia, a new study brings good news for.the world’s wild tigers. According to a new report by.the World Wildlife Fund (WWF), the number of.tigers living in the wild may have been slowly rising.over the last several years. If continued surveys prove.this to be true, this would mark the first time in more.than a century that tiger populations have grown..In a study compiling surveys taken across Asia,.researchers at the WWF found that there are at least 3,890 tigers living in the wild today—a considerable.increase from the 3,200 recorded in 2010. The study.suggests that the commitment to and success of.conservation programs in some countries have.contributed to the overall growth of the global tiger.population..“It’s a positive trend,” Ginette Hemley, the WWF’s.senior vice president of wildlife conservation, says..“We’re cautiously hopeful.”.Counting wild tigers, however, isn’t easy. While.tens of thousands of tigers once roamed Asia from.Turkey to Indonesia, their habitats have become tiny.and scattered during the last century. Wild tigers are.notoriously elusive, preferring to hide out in hard-to-.reach places in jungle undergrowth and high.mountains..Combined with their low numbers, these factors.can make them difficult to keep track of, which can.leave some uncertainty as to whether the populations.are truly on the rise. The increased numbers may in.part reflect better surveying methods..Additionally, while the global number of wild.tigers appears to have gone up, a country-by-country.analysis is more sobering. Though several countries.including India, Nepal, Bhutan and Russia may have.gone up in recent years, others have seen tigers.disappear thanks to poaching and habitat loss..Passage 2.Photographic capture-recapture and large-scale.occupancy modeling are now used to estimate tiger.numbers and range in several countries across Asia..(Scientists who study other elusive carnivores with.unique body markings, including African wild dogs.and wolverines, are also employing these approaches.).Yet on the whole, although the science of tiger.population assessment has rapidly progressed, its.adoption by governmental and nongovernmental.conservation agencies has not, whether because of a.lack of understanding of or comfort with the new.methods or because the old methods cast a more.flattering light on their efforts..A recent example illustrates just how insidious.reliance on outdated tools is. In April the WWF and.the Global Tiger Forum announced to great fanfare.that the planet’s wild tiger population was at last on.the rise, numbering 3,890 individuals. These groups.aim to increase the number of tigers to 6,000 by 2022..But their tally, based on official estimates, relied on.flawed methodologies, including the use of.statistically weak extrapolations from tiger.photographs and field counts of spoor.^1 And their.goal for population growth far exceeds what one.would expect to realize on the basis of studies carried.out using more rigorous techniques. Furthermore,.apart from the increases in tigers in a few reserves in.India and parts of Thailand, there are no convincing.data to show that populations are recovering in the.rest of Southeast Asia or Russia. Indeed, countries.such as Cambodia, Vietnam and China have lost their.viable tiger populations in recent years—losses.masked by any single global tiger number..Speculative tiger numbers for countries and.regions undermine efforts to save tigers by distracting.conservationists and the public from what should be.our top priority: guarding and growing the source.populations.^2 In a way, the overall number of wild.tigers, if we could even get an accurate count, may not.matter. The source populations are the ones we need.to monitor vigilantly, using the best science available.to track their numbers. Only with reliable counts can.we set realistic goals for future growth, develop.suitable strategies for meeting those goals and.measure the impact of our conservation efforts..(^1) Animal droppings.(^2) Animals located in areas with suitable conditions for reproduction.to take place.History shows that scientific progress can stall.from lack of understanding, institutional inertia and.political considerations for decades or even centuries..But as the world enters into the sixth mass extinction.of wild species, we simply cannot afford to divorce.conservation practices from sound science if we are to.have any hope of saving a wildlife icon like the.majestic tiger.
Question: According to Passage 1, counting wild tigers is difficult because tigers
 A. move extremely quickly from one location to another.
 B. reside in environments that are relatively inaccessible to humans.
 C. bear a superficial resemblance to other related species.
 D. exhibit behavior that is potentially threatening to humans.
Answer: B


Question:
At field sites around the world, Ken Dial saw a pattern in how young pheasants, quail, tinamous, and other ground birds ran along behind their  parents. "They jumped up like popcorn," he said, 5 describing how they would flap their half-formed wings and take short hops into the air. So when a group of graduate students challenged him to come up with new data on the age-old ground-up-tree-down debate, he designed a project10 to see what clues might lie in how baby game birds learned to fly.Ken settled on the Chukar Partridge as a model species, but he might not have made his discovery without a key piece of advice from the local15 rancher in Montana who was supplying him with birds. When the cowboy stopped by to see how things were going, Ken showed him his nice, tidy laboratory setup and explained how the birds' first hops and flights would be measured. The rancher20 was incredulous. "He took one look and said, in pretty colorful language, 'What are those birds doing on the ground? They hate to be on the ground! Give them something to climb on!" At first it seemed unnatural-ground birds don't like the ground? But25 as he thought about it Ken realized that all the species he'd watched in the wild preferred to rest on ledges, low branches, or other elevated perches where they were safe from predators. They really only used the ground for feeding and traveling. So he brought30 in some hay bales for the Chukars to perch on and then left his son in charge of feeding and data collection while he went away on a short work trip.Barely a teenager at the time, young Terry Dial was visibly upset when his father got back. "I asked 35 him how it went," Ken recalled, "and he said, 'Terrible! The birds are cheating!' " Instead of flying up to their perches, the baby Chukars were using their legs. Time and again Terry had watched them run right up the side of a hay bale, flapping all the40 while. Ken dashed out to see for himself, and that was the "aha" moment. "The birds were using their wings and legs cooperatively," he told me, and that single observation opened up a world of possibilities.Working together with Terry (who has since gone 45 on to study animal locomotion), Ken came up with a series of ingenious experiments, filming the birds as they raced up textured ramps tilted at increasing angles. As the incline increased, the partridges began to flap, but they angled their wings differently from 50 birds in flight. They aimed their flapping down and backward, using the force not for lift but to keep their feet firmly pressed against the ramp. "It's like the spoiler on the back of a race car," he explained, which is a very apt analogy. In Formula One racing, 55 spoilers are the big aerodynamic fins that push the cars downward as they speed along, increasing traction and handling. The birds were doing the very same thing with their wings to help them scramble up otherwise impossible slopes.60 Ken called the technique WAIR, for wing-assisted incline running, and went on to document it in a wide range of species. It not only allowed young birds to climb vertical surfaces within the first few weeks of life but also gave adults an energy-efficient65 alternative to flying. In the Chukar experiments, adults regularly used WAIR to ascend ramps steeper than 90 degrees, essentially running up the wall and onto the ceiling.In an evolutionary context, WAIR takes on 70 surprising explanatory powers. With one fell swoop, the Dials came up with a viable origin for the flapping flight stroke of birds (something gliding animals don't do and thus a shortcoming of the tree-down theory) and an aerodynamic function for 75 half-formed wings (one of the main drawbacks to the ground-up hypothesis)
Question: What can reasonably be inferred about gliding animals from the passage?
 A. Their young tend to hop along beside their parents instead of flying beside them.
 B. Their method of locomotion is similar to that of ground birds.
 C. They use the ground for feeding more often than for perching.
 D. They do not use a flapping stroke to aid in climbing slopes.
Answer:

Choices:
- A
- B
- C
- D

At field sites around the world, Ken Dial saw a pattern in how young pheasants, quail, tinamous, and other ground birds ran along behind their  parents. "They jumped up like popcorn," he said, 5 describing how they would flap their half-formed wings and take short hops into the air. So when a group of graduate students challenged him to come up with new data on the age-old ground-up-tree-down debate, he designed a project10 to see what clues might lie in how baby game birds learned to fly.Ken settled on the Chukar Partridge as a model species, but he might not have made his discovery without a key piece of advice from the local15 rancher in Montana who was supplying him with birds. When the cowboy stopped by to see how things were going, Ken showed him his nice, tidy laboratory setup and explained how the birds' first hops and flights would be measured. The rancher20 was incredulous. "He took one look and said, in pretty colorful language, 'What are those birds doing on the ground? They hate to be on the ground! Give them something to climb on!" At first it seemed unnatural-ground birds don't like the ground? But25 as he thought about it Ken realized that all the species he'd watched in the wild preferred to rest on ledges, low branches, or other elevated perches where they were safe from predators. They really only used the ground for feeding and traveling. So he brought30 in some hay bales for the Chukars to perch on and then left his son in charge of feeding and data collection while he went away on a short work trip.Barely a teenager at the time, young Terry Dial was visibly upset when his father got back. "I asked 35 him how it went," Ken recalled, "and he said, 'Terrible! The birds are cheating!' " Instead of flying up to their perches, the baby Chukars were using their legs. Time and again Terry had watched them run right up the side of a hay bale, flapping all the40 while. Ken dashed out to see for himself, and that was the "aha" moment. "The birds were using their wings and legs cooperatively," he told me, and that single observation opened up a world of possibilities.Working together with Terry (who has since gone 45 on to study animal locomotion), Ken came up with a series of ingenious experiments, filming the birds as they raced up textured ramps tilted at increasing angles. As the incline increased, the partridges began to flap, but they angled their wings differently from 50 birds in flight. They aimed their flapping down and backward, using the force not for lift but to keep their feet firmly pressed against the ramp. "It's like the spoiler on the back of a race car," he explained, which is a very apt analogy. In Formula One racing, 55 spoilers are the big aerodynamic fins that push the cars downward as they speed along, increasing traction and handling. The birds were doing the very same thing with their wings to help them scramble up otherwise impossible slopes.60 Ken called the technique WAIR, for wing-assisted incline running, and went on to document it in a wide range of species. It not only allowed young birds to climb vertical surfaces within the first few weeks of life but also gave adults an energy-efficient65 alternative to flying. In the Chukar experiments, adults regularly used WAIR to ascend ramps steeper than 90 degrees, essentially running up the wall and onto the ceiling.In an evolutionary context, WAIR takes on 70 surprising explanatory powers. With one fell swoop, the Dials came up with a viable origin for the flapping flight stroke of birds (something gliding animals don't do and thus a shortcoming of the tree-down theory) and an aerodynamic function for 75 half-formed wings (one of the main drawbacks to the ground-up hypothesis)
Question: What can reasonably be inferred about gliding animals from the passage?
 A. Their young tend to hop along beside their parents instead of flying beside them.
 B. Their method of locomotion is similar to that of ground birds.
 C. They use the ground for feeding more often than for perching.
 D. They do not use a flapping stroke to aid in climbing slopes.
Answer: D