Adapted from “Birds in Retreat” in “Animal Defences—Active Defence” in Volume Four of The Natural History of Animals: The Animal Life of the World in Its Various Aspects and Relations by James Richard Ainsworth Davis (1903)

Among the large running birds are forms, like the African ostrich, in which the absence of powers of flight is largely compensated by the specialization of the legs for the purpose of rapid movement on the ground. For straightforward retreat in open country nothing could be more effective; but another kind of adaptation is required in birds like rails, which are deficient in powers of flight, and yet are able to run through thickly-growing vegetation with such rapidity as to commonly elude their enemies. This is rendered possible by the shape of their bodies, which are relatively narrow and flattened from side to side, so as to easily slip between the stems of grasses, rushes, and similar plants. Anyone who has pursued our native land-rail or corn-crake with intent to capture will have noted how extremely difficult it is even to get within sight of a bird of this sort. 

Certain birds, unfortunately for themselves, have lost the power of flight without correspondingly increased powers of running, and have paid the penalty of extinction. Such an arrangement, as might be anticipated, was the result of evolution in islands devoid of any predatory ground-animals, and a classic example of it is afforded by the dodo and its allies, birds related to the pigeons. The dodo itself was a large and clumsy-looking species that at one time abounded in the island of Mauritius, which, like oceanic islands generally, possessed no native mammals, while its indigenous reptiles were only represented by lizards. The ubiquitous sailor, however, and the animals (especially swine) which he introduced, brought about the extinction of this helpless bird in less than a century after its first discovery in 1598. Its memory is now only kept green by a few contemporary drawings and descriptions, certain museum remains, and the proverb "as extinct as a dodo.” A similar fate must overtake any organism suddenly exposed to new and unfavorable conditions, if devoid of sufficient plasticity to rapidly accommodate itself to the altered environment.

How does the second paragraph relate to the first paragraph?

Adapted from "Errors in Our Food Economy" in Scientific American Supplement No. 1082 Vol. XLII (September 26th, 1896)

Scientific research, interpreting the observations of practical life, implies that several errors are common in the use of food.

First, many people purchase needlessly expensive kinds of food, doing this under the false impression that there is some peculiar virtue in the costlier materials, and that economy in our diet is somehow detrimental to our dignity or our welfare. And, unfortunately, those who are most extravagant in this respect are often the ones who can least afford it.

Secondly, the food which we eat does not always contain the proper proportions of the different kinds of nutritive ingredients. We consume relatively too much of the fuel ingredients of food, such as the fats of meat and butter, and the starch which makes up the larger part of the nutritive material of flour, potatoes, sugar, and sweetmeats. Conversely, we have relatively too little of the protein of flesh-forming substances, like the lean of meat and fish and the gluten of wheat, which make muscle and sinew and which are the basis of blood, bone and brain.

Thirdly, many people, not only the well-to-do, but those in moderate circumstances, use needless quantities of food. Part of the excess, however, is simply thrown away with the wastes of the table and the kitchen; so that the injury to health, great as it may be, is doubtless much less than if all were eaten. Probably the worst sufferers from this evil are well-to-do people of sedentary occupations.

Finally, we are guilty of serious errors in our cooking. We waste a great deal of fuel in the preparation of our food, and even then a great deal of the food is very badly cooked. A reform in these methods of cooking is one of the economic demands of our time.

It is the author's opinion that we should consume less/fewer __________ and more __________.

"Cacti" by Ami Dave (2013)

Cacti are plants suited to the desert, and we must always keep this factor in mind when growing ornamental cacti in our gardens, for it helps us provide cacti with conditions that allow them to survive and thrive. For example, a cactus should never be watered over its body, as it will start to rot. This is because it is covered with a waxy coating which prevents water loss through evaporation. When one waters the cactus over its body, the waxy coating is washed away and the plant begins to rot. The amount of water that one must supply to the cactus is very much dependent upon the season and upon the climate of the place. During the summer season one should water cacti every four days, whereas in the rainy season, once every fifteen days is quite enough.

Cacti need a minimum of two and a half hours of sunlight per day; however, they should not be kept in the sun all day because they may wrinkle when exposed to too much bright sunlight. Unlike other plants, cacti produce carbon dioxide during the day and oxygen during the night, so they are ideal plants to be kept in bedrooms to freshen up the air at night.

If a cactus is to thrive and prosper, the size of the pot in which it is grown needs to be monitored carefully. The pot should always be a little smaller than the plant itself because it is only when the plant has to struggle to survive that it will thrive. If the pot is too spacious and the plant does not need to struggle, chances are that the cactus will die. Similarly, if a cactus shows no signs of growth, stop watering it. Watering should be resumed only when the plant begins to grow again.

The substrata of a cactus pot is ideally composed of pieces of broken bricks at the bottom, followed by a layer of charcoal above the bricks, and then coarse sand and pebbles above the charcoal. Leaf mould is the best manure.

Grafting cacti is very simple. A very small piece of the cactus plant should be stuck with tape to the plant that needs grafting. The smaller the piece, the easier it is to graft. To reproduce cacti, one has to simply cut off a piece of the cactus, allow it to dry for a few days, and then place it over the cacti substrate. It will automatically develop roots.

It is very easy to differentiate between cacti and other plants that look like cacti. All cacti have fine hair at the base of each thorn. The so-called “thorns” are in fact highly modified leaves which prevent loss of water through transpiration. If one ever gets pricked by cacti thorns, one should take tape, place it over the area where the thorns have penetrated the skin, and then peel it off. All of the thorns will get stuck to the tape and will be removed.

The development of a new cactus from a graft is similar to what other biological phenomenon?

Adapted from An Introduction to Astronomy by Forest Ray Moulton (1916 ed.)

The ancient Greeks, at a period four or five hundred years preceding the common era, definitely undertook to find from systematic observation how celestial phenomena follow one another. They determined very accurately the number of days in the year, the period of the moon's revolution, and the paths of the sun and the moon among the stars; they correctly explained the cause of eclipses and learned how to predict them with a considerable degree of accuracy; they undertook to measure the distances to the heavenly bodies, and to work out a complete system that would represent their motions. The idea was current among the Greek philosophers that the earth was spherical, that it turned on its axis, and, among some of them, that it revolved around the sun. They had true science in the modern acceptance of the term, but it was largely confined to the relations among celestial phenomena.

The conception that the heavens are orderly, which they definitely formulated and acted on with remarkable success, has been extended, especially in the last two centuries, so as to include the whole universe. The extension was first made to the inanimate world and then to the more complicated phenomena associated with living beings. Every increase in carefully recorded experience has confirmed and strengthened the belief that nature is perfectly orderly, until now every one who has had an opportunity of becoming familiar with any science is firmly convinced of the truth of this principle, which is the basis of all science.

Which best describes the contrast between modern and ancient science?

"Comparing Technologies: A Difficult Endeavor" by Matthew Minerd (2014)

Comparisons of technology are often difficult to make, not only because of the rapid pace of improvements but also because of the many new applications that are available as time progresses. If we were to consider the contemporary graphing calculator and the calculation capacities of computing machines from fifty years ago, there would be astounding improvements between these two devices. However, the improvements are not reduced merely to speed improvements. A graphing calculator also has numerous output capacities that far exceed those available much older computers, none of which had the ability to represent their output in any manner even closely resembling that of contemporary devices. Merely consider the display capacities of such a device. These enable users to input many new kinds of information, enabling design engineers to design new hardware functions to match the new means of collecting user input.

The situation is even more obvious when one considers the numerous functions performed by a modern “smartphone.” These devices are equipped with a panoply of features.  With all of these new functions come many new types of computational capabilities as well. In order to process images quickly, specialized hardware must be designed and software written for it in order to ensure that there are few issues with the phone’s operation. Indeed, the whole “real time” nature of telecommunications has exerted numerous pressures on the designers of computing devices. Layers of complexity, at all levels of production and development, are required to ensure that the phone can function in a synchronous manner. Gone are the days of asynchronous processing, when the computer user entered data into a mainframe, only to wait for a period of time before the processing results were provided. Today, even the smallest of digital devices must provide seamless service for users. The effects of this requirement are almost beyond number.

Which of the following best describes the contrast between newer and older calculating devices?

Adapted from “Some Strange Nurseries” by Grant Allen in A Book of Natural History (1902, ed. David Starr Jordan)

Among the larger lizards, a distinct difference may be observed between the American alligator and its near ally, the African crocodile. On the banks of the Mississippi, the alligator lays a hundred eggs or thereabouts, which she deposits in a nest near the water’s edge, and then covers them up with leaves and other decaying vegetable matter. The fermentation of these leaves produces heat and so does for the alligator’s eggs what sitting does for those of hens and other birds: the mother deputes her maternal functions, so to speak, to a festering heap of decomposing plant-refuse. Nevertheless, she loiters about all the time to see what happens, and when the eggs hatch out, she leads her little ones down to the river, and there makes alligators of them. This is a simple nursery arrangement of the big lizards.

The African crocodile, on the other hand, does something different, and takes greater care for the safety of its young. It lays only about thirty eggs, but these it buries in warm sand, and then lies on top of them at night, both to protect them from attack and to keep them warm during the cooler hours. In short, it sits upon them. When the young crocodiles within the eggs are ready to hatch, they utter an acute cry. The mother then digs down to the eggs, and lays them freely on the surface, so that the little reptiles may have space to work their way out unimpeded. This they do by biting at the shell with a specially developed tooth; at the end of two hours’ nibbling they are free, and are led down to the water by their affectionate parent. In these two cases we see the beginnings of the instinct of hatching, which in birds has become almost universal.

How does the author of this passage compares the American alligator and the African crocodile in terms of __________.

Adapted from A Modern History from the Time of Luther to the Fall of Napoleon by John Lord (1874)

For more than ten centuries, great struggles have been going on in society between the dominant orders and sects. The victories gained by the oppressed millions over their different masters, constitute what is called the progress of society. When any great order defended the cause of the people against the tyranny and selfishness of another order, then the people have advanced a step in civil and social freedom.

When feudalism weighed heavily upon the people, the clergy sought justice on their behalf. By the aid of the church, royalty also rose above feudalism, and aided the popular cause. The church, having gained the ascendency, sought then to enslave the kings of the earth. But royalty, borrowing help from humiliated nobles and from the people, became the dominant power in Europe.

In these struggles, the people acquired political importance. They had obtained a knowledge of their rights and of their strength; and they were determined to maintain them. They liked not the tyranny of either nobles, priests, or kings; but they bent all their energies to suppress the power of the latter, since the two former had been already humiliated.

The struggle of the people against royalty is preeminently the genius of the English Revolution. It is to be doubted whether any king could have resisted the storm of popular fury which hurled Charles from his throne. But no king could have managed worse than he; no king could be more unfortunately and unpropitiously placed, and his own imprudence and folly hastened the catastrophe.

The House of Commons, which had acquired great strength, spirit, and popularity during the reign of James, fully perceived the difficulties and necessities of Charles, but made no adequate or generous effort to relieve him from them. Some of the more turbulent rejoiced in them. They knew that kings, like other men, were selfish, and that it was not natural for people to part with their privileges and power without a struggle, even though this power was injurious to the interests of society. In the Middle Ages, barons, bishops, and popes had fought desperately in the struggle of classes; and it was only from their necessities that either kings or people had obtained what they demanded. King Charles, no more than Pope Boniface VIII, would surrender, as a boon to man, without compulsion, his supposed omnipotence.

How does the first half of this essay primarily differ from the second half?

"Addictions" by Matthew Minerd (2013)

Addictions come in many forms, often quite hidden from those who should be aware of them. It is helpful to be aware of how hidden these obsessive behaviors can be. Often, they appear to be harmless, but this appearance is deceptive.  Perhaps several examples can assist in increasing the reader’s awareness of these potentially problematic habits. 

A very simple example of such an apparently innocuous addiction is the addiction that many people have to a beverage like coffee. While not as destructive as an addiction to alcohol, an extreme need for caffeine often covers a need for more sleep or an overzealous desire to be completely energetic at every waking moment. Also, a great deal of caffeine can potentially do damage to one’s heart due to the stress caused by its stimulating effects. 

Another example of a seemingly harmless addiction can be found in the case of people who are addicted to work. It is very tempting to praise such obsessive behavior, as it provides many benefits for others and even for the one doing the work. The advancement of a career certainly seems beneficial and often allows for great personal and financial fulfillment. Nevertheless, constant work often hides some sadness, insecurity, or fear that should be confronted by the person who slaves away without cessation. Likewise, over time, such continuous work often can be greatly destructive of important personal relationships.

Of course, many more examples could be brought forth, for one can obsess over almost anything. Still, even these two simple examples should make clear to the reader that it is possible for there to be apparently harmless—indeed, seemingly helpful—life practices that in reality can pose a potential harm to one’s physical or mental well-being.

What is different about the way that the author presents addiction to work and addiction to coffee?

"American Students and Foreign Languages" by Matthew Minerd (2013)

American students often find it difficult to understand the need for learning a foreign language. In part, this lack of understanding seems to occur because of the insulated nature of American geography. Unlike Europe, America is a massive country, comprised of states that all speak the same language. When an American travels from state to state, he or she is not confronted with a completely different language group as is the case when, for example, a Frenchman travels from his native land to the neighboring country of Italy or to England. Although America does have Canada to its north and Mexico to its south, it still does not have the great internal variety of languages as one finds in the small European continent. Therefore, students often do not experience the practical importance of knowing other languages.

Of course, America has always been called the “melting pot,” for many peoples have arrived on its shores, bringing their own distinctive cultures and languages with them. Still, this very expression—“melting pot”—shows that these immigrant cultures do not forever retain their own particular manners and languages. With time, these varied cultures become part of the American culture as a whole. While they do influence and change the culture, they likewise become assimilated into it. Their spoken language often becomes English. Even if they retain their mother tongue, they generally speak it privately. This is done as a matter of personal heritage, not as part of the day-to-day life in the culture. 

Additionally, America’s global dominance likewise allows Americans to avoid learning other languages. Since America has such influence over the rest of the world, it is generally in the interests of other peoples to learn English in order to be part of the economic, political, and military world in which America operates. Therefore, even at international meetings that are filled with people from many nationalities and language groups, English-speakers are at an advantage because they can talk with the many individuals who speak English. The work and learning of other peoples thus allows the Americans to convince themselves that there is no need to learn another language. 

Lastly, American education has come to emphasize mathematics and science to such a great degree that things such as language can often seem unimportant. The main goals of education are said to be the training of students for the technology workforce. If this is presented as the main goal of school, few children will understand why any of the non-scientific subjects are included in the curriculum. If a subject does not help in learning math and science, it will appear to be irrelevant. In particular, foreign languages do not seem to add to the teaching of math and science, which can be done very easily and effectively in English alone. 

Of course, many other reasons could be considered, and a more detailed discussion would undertake such a lengthy investigation. Still, the factors discussed above do provide some sense as to why American students find it difficult to understand the importance of learning a foreign language.

What is the contrast expressed in the first paragraph?

While the Gutenberg press was perhaps one of the greatest inventions of all time, we should not let its importance blind us to other very important events in the history of linguistic development. Granted, the efficiency of printing allowed for the dissemination of much learning in Europe. Still, such printing was not unique to Europe, and even in the scope of world history, there are several events that are equally as miraculous regarding the transmission of knowledge.

For instance, most people overlook the amazing nature of the first time that human beings communicated with spoken language. Perhaps there were simple signs by which these early humans could indicate their needs to each other; however, when the first event of person-to-person speech occurred, it was far more marvelous than simple practical communication. Such speech was like a sharing in ideas. When true speech happened, persons were able to communicate knowledge to each other, freeing it from its isolation in one lonely person. By means of such speech, knowledge could be orally transmitted from generation to generation, thus preserving wisdom in a way that is completely impossible without speech.

Of course, such spoken tradition is very fragile, relying on memories and stories that are passed down from generation to generation. For this reason, the invention of writing is extremely important. In contrast to the spoken word, the written word can continue to exist and be useful so long as it can be read intelligently. Likewise, much more can be recorded than ever could be remembered by someone with the best of memories. Indeed, once these records are written, copies can be sent to anyone who is able to read the language in question. Just so, it can be translated into written copies to be read by others. For these (as well as many other reasons) the invention of writing was a very significant event in history, greatly expanding the possibilities for the exchange of knowledge.

Thus, the printing press is quite important, but it is part of a larger story. Like both spoken and written communication, it allows human beings to communicate knowledge not only to each other but also across multiple generations. Often, we think of the press merely in its ability to provide a great number of books in a short period of time; however, when considered as a chapter in this longer tale, it likewise appears as the means by which humanity is able to conquer time by allowing the knowledge of today to live for multiple generations.

How does the author’s main idea become developed in a new way in the last paragraph?