All practice questions

The two texts below offer differing theoretical frameworks regarding the origins and nature of money.

Passage A
The origin of money is conventionally traced to the organic evolution of market exchange. In early human societies, economic transactions were constrained by the severe inefficiencies of direct barter, which necessitates a "double coincidence of wants"—both parties must simultaneously desire precisely what the other has to offer. To overcome this systemic friction, profit-seeking individuals spontaneously began utilizing highly marketable commodities, such as cattle, salt, or precious metals, as intermediary media of exchange. Over time, precious metals like gold and silver became the dominant form of money globally due to their durability, divisibility, and physical portability. Crucially, in this classical framework, money's purchasing power is intrinsically linked to the independent market value of the underlying commodity itself. The historical transition from weighing raw bullion to trading standardized coinage did not alter this fundamental reality; it merely represented a technological convenience. State authorities eventually stepped in to mint coins with standardized weights and purities, thereby saving merchants the transaction costs of repeatedly weighing and assaying metals during every trade. However, the state did not bestow economic value upon the money; it merely certified the intrinsic value already established by the spontaneous, decentralized order of the market.

Passage B
Traditional economic narratives routinely suggest that money emerged spontaneously from barter as a convenient medium of exchange, yet the actual historical and anthropological records reveal a radically different genesis. Money is, and historically always has been, fundamentally a creature of the state or centralized authority. The earliest unequivocally documented monetary systems in ancient Mesopotamia did not consist of autonomous merchants trading silver for grain in local markets; rather, they were sophisticated, abstract administrative accounting systems developed by palace and temple bureaucracies to track debts, exact tribute, and manage resource allocation. Money was created not to facilitate decentralized private trade, but to organize state provisioning. By imposing non-reciprocal tax or tribute obligations on its population denominated in a specific unit of account, a central authority creates an immediate, pervasive demand for whatever physical tokens it decides to issue and accept to settle those obligations. It is exactly this legal and administrative mechanism—the power to tax and the exclusive designation of what constitutes acceptable payment—that imparts value to money, strictly irrespective of the token's intrinsic material worth. Consequently, the state's role is not merely an afterthought providing the convenience of standardized minting, but the very ontological foundation of monetary value itself. A token accepted by the state for tax settlement functions perfectly well as money, even if it is recorded on a clay tablet or printed on otherwise worthless paper.

Based on the principles outlined in Passage B, how would the author of Passage B most likely explain the historical phenomenon, noted in Passage A, that precious metals like gold and silver became the dominant form of money globally?

Survival in the extreme environment of deep-sea hydrothermal vents strictly requires the ability to efficiently metabolize toxic sulfur compounds. A newly discovered archaeon, *P. ventis*, thrives in these vents yet entirely lacks the specific genetic operons known to facilitate sulfur metabolism in all other documented vent-dwelling organisms. Consequently, researchers concluded that *P. ventis* must rely on an entirely novel, previously unidentified genetic mechanism to metabolize sulfur.

Which one of the following is an assumption on which the researchers' argument depends?

For decades, plant biologists conceptualized forest ecosystems as assemblages of individual organisms locked in direct competition for light, water, and soil nutrients. However, recent advances in isotope tracing and molecular ecology have revealed that beneath the forest floor lies a vast, interconnected subterranean network facilitated by mycorrhizal fungi. These fungal hyphae physically connect the root systems of separate trees—even those belonging to disparate species—forming what researchers term common mycorrhizal networks (CMNs). Through these conduits, carbon, nitrogen, and phosphorus are actively redistributed between individuals. Field studies have demonstrated that mature canopy trees, possessing substantial photosynthetic capacity, frequently transfer surplus carbohydrates to shaded understory seedlings that would otherwise perish from light limitation. In addition to nutrient transfer, CMNs serve as biochemical signaling pathways: when an herbivore attacks a donor plant, the damaged plant transmits chemical defense warnings through the fungal network to neighboring conspecifics, prompting them to synthesize protective enzymes before infestation occurs. While early interpretations characterized this mutualism as purely altruistic cooperation, evolutionary biologists now emphasize that the fungal symbionts mediate these resource exchanges primarily to maximize their own carbon acquisition and metabolic stability.

According to the passage, which of the following is an explicit effect of transmitting chemical defense warnings through common mycorrhizal networks when a plant is attacked by herbivores?

Dr. Sterling: Novel pharmaceuticals for rare terminal conditions should be approved by regulatory agencies only if evaluated through fixed-protocol randomized clinical trials. Adaptive trial designs—which alter randomization ratios or dosing regimens as interim patient outcomes emerge—undermine the experimental blinding and statistical independence necessary to establish definitive causal efficacy.

Dr. Park: While fixed-protocol trials maintain pristine statistical independence, they unethically consign patients to ineffective therapies when early data already demonstrate a clear treatment effect. Moreover, modern Bayesian statistical adjustments adequately compensate for the inferential biases introduced by mid-trial modifications, generating causal evidence sufficiently robust to support regulatory approval.

The dialogue provides the most support for the claim that Dr. Sterling and Dr. Park disagree over which one of the following?

In Anglo-American jurisprudence, the public trust doctrine historically posited that certain natural resources—primarily navigable waterways, shorelines, and the submerged lands beneath them—are preserved for public use and held in trust by the sovereign. The doctrine traces its origins to Roman civil law, specifically the Institutes of Justinian, which categorized running water, the sea, and the seashore as res communes: things common to all mankind. However, when English common law absorbed this concept, the doctrine's scope was significantly narrowed. Under the English framework, the Crown retained ownership (jus privatum) of tidal waters and submerged beds, but this title was strictly subordinate to the public's right of navigation and fishing (jus publicum). Notably, non-tidal waters, regardless of their actual commercial navigability in fact, were excluded from the public trust and remained subject to private riparian ownership.

The American adaptation of the doctrine in the nineteenth century necessitated a departure from English precedent due to geographic realities. While England possessed few significant non-tidal navigable bodies of water, the North American continent featured vast inland lakes and interconnected river systems critical to national commerce. In the landmark 1851 decision The Propeller Genesee Chief v. Fitzhugh, the United States Supreme Court formally discarded the English tidal requirement, holding that federal admiralty jurisdiction extends to all waters that are navigable in fact. Four decades later, in Illinois Central Railroad Co. v. Illinois (1892), the Court applied the public trust doctrine to invalidate a state legislative grant of over one thousand acres of submerged lands under Lake Michigan to a private railroad. The Court established that states hold title to navigable waters in trust for the people and cannot abdicate this trust through wholesale transfers to private commercial entities, except in rare instances where public access and navigational interests are directly enhanced.

In recent decades, environmental legal scholars have argued for expanding the doctrine beyond its classical maritime boundaries to include non-navigable tributaries, groundwater aquifers, atmospheric resources, and wildlife habitats. Proponents argue that the inherent fiduciary duty of the sovereign to preserve essential ecological commons justifies such expansion. Conversely, critics contend that extending the public trust beyond established riparian borders undermines settled property expectations and impermissibly displaces comprehensive statutory regulatory schemes enacted by legislatures.

According to the passage, which of the following was an explicit characteristic of the public trust doctrine under English common law?

Archivist: Any digital archiving project that utilizes proprietary file formats will eventually require format migration to maintain public accessibility. However, migrating complex digital records across different formats invariably introduces some data degradation. Therefore, no archiving project that maintains perfect record fidelity can utilize proprietary file formats.

The archivist's conclusion follows logically if which one of the following is assumed?

Match each of the following research arguments with the supplementary finding that most strongly strengthens its conclusion.

Analyze the five argumentative excerpts presented below, each of which exhibits a distinct logical defect. Match each excerpt to the abstract description that most accurately identifies its reasoning flaw.

To achieve certification from the Quantum Security Consortium (QSC), a cryptographic network must guarantee absolute data integrity. Any network that guarantees absolute data integrity continuously monitors photon polarization. Furthermore, continuous monitoring of photon polarization inevitably induces measurable signal latency whenever a network's transmission distance exceeds 100 kilometers. Yet, it is a strict requirement that no QSC-certified network can exhibit measurable signal latency. Recently, at least some newly implemented networks employing dynamic entanglement protocols have achieved QSC certification.

Which one of the following statements must be true based on the information provided?

Logical analysis requires distinguishing between valid deductive argument forms and specific formal fallacies regardless of factual content. Which abstract structural description or logical flaw correctly corresponds to each argument below?

Urban Planner: To reduce traffic congestion, the city fully subsidized public transit passes for all car-owning residents of the central business district. Six months later, average morning rush-hour commute times for vehicles entering the central business district have decreased by twenty percent. This clearly demonstrates that the transit subsidy successfully motivated a large number of these residents to switch from driving to taking public transit.

Which one of the following, if true, most seriously weakens the urban planner's argument?

Under eighteenth-century English maritime law, the doctrine of general average required all participants in a commercial voyage to proportionally share any intentional property sacrifice made to preserve the enterprise from imminent peril. To qualify as a general average, the danger had to be immediate, the sacrifice of cargo or gear had to be voluntary, and the action had to successfully preserve the remainder of the ship and cargo. Losses resulting from accidental damage, ordinary wear, or unsuccessful rescue attempts were classified as particular averages, borne exclusively by the individual owner of the damaged goods.

Statement: Under eighteenth-century English maritime law, a voluntary sacrifice of cargo during an imminent crisis was classified as a general average even if the effort failed to preserve the vessel.

Paleoclimatologist: Sediment core samples extracted from Lake Sylvan reveal a dramatic spike in charcoal microparticles around 850 CE, closely accompanied by a sharp decline in pollen from old-growth oak forests and an influx of pioneer scrub vegetation. Although many historians attribute this abrupt ecological transformation to widespread land-clearing by early agrarian migrants, it is more likely that a severe, multi-decade regional drought sparked extensive natural wildfires that reshaped the landscape.

Which of the following, if true, most strongly supports the paleoclimatologist's hypothesis?

Passage A
The burgeoning field of de-extinction—the use of cloning and genetic engineering to resurrect extinct species—offers a profound opportunity to rectify historical ecological wrongs. Critics often characterize this endeavor as a frivolous display of technological hubris, yet they ignore the deep moral imperative at its core. Humanity bears direct responsibility for the eradication of countless species; consequently, we possess an ethical duty to reverse this damage if the technological means to do so exist. While the habitats of these lost species have undoubtedly suffered degradation in their absence, the foundational ecosystems remain viable. Reintroducing keystone species, such as the passenger pigeon or the woolly mammoth, would not only fulfill our restorative obligations but also serve as a crucial catalyst for revitalizing and stabilizing these degraded environments.

Passage B
Proponents of de-extinction operate under the dangerous delusion that ecological history can simply be rewound. The resources poured into these high-tech resurrection projects would be far better spent on conventional conservation efforts directed at currently endangered species, whose habitats we can still realistically protect. Furthermore, the moral justification for de-extinction rests on a fundamental misunderstanding of ecological dynamics. The environments that once supported these extinct creatures have not merely degraded; they have been irreversibly transformed by climate change, human expansion, and the introduction of novel species. Bringing a mammoth into the 21st-century Arctic is not returning it to its home, but rather forcing it into an alien landscape. This is not restorative justice; it is an irresponsible ecological experiment driven by anthropocentric guilt.

The provided texts offer differing perspectives on the ethics and ecological viability of resurrecting extinct species. Which of the following propositions represents a point over which the authors of Passage A and Passage B fundamentally disagree?

Ecologist: Any wetlands conservation initiative that permanently elevates local water tables prevents the microbial decomposition of subterranean peat. Preventing the microbial decomposition of subterranean peat guarantees that a wetland will not release methane into the atmosphere. The wetlands conservation project in the Millford Basin will permanently elevate local water tables. Thus, the Millford Basin project will contribute to a net decrease in atmospheric greenhouse gas concentrations.

The ecologist's conclusion follows logically if which one of the following is assumed?

Consider the following passage:

In nineteenth-century comparative linguistics, researchers sought to explain systematic phonological shifts across Indo-European languages. In 1822, Jacob Grimm formulated Grimm’s Law, which established that Proto-Indo-European voiceless stops systematically shifted to voiceless fricatives in Proto-Germanic. However, several apparent anomalies resisted Grimm's formulation. In 1875, Danish linguist Karl Verner resolved these discrepancies by demonstrating that voiceless stops instead became voiced fricatives whenever the original accent fell on a subsequent syllable, a phenomenon termed Verner’s Law. Later, in 1879, Ferdinand de Saussure published a groundbreaking treatise positing 'sonant coefficients'—unattested theoretical consonants that accounted for irregular vowel alternations across daughter languages, later confirmed by the discovery of Hittite laryngeals.

Match each historical linguist with the specific phonological finding or theoretical contribution explicitly attributed to them in the passage.

Read the following two passages regarding the extinction of Pleistocene megafauna.

Passage A
The late Pleistocene epoch witnessed a dramatic loss of large mammalian species (megafauna) across the globe, an extinction event that closely tracks the global expansion of anatomically modern humans. The "overkill" hypothesis posits that human hunters, armed with advanced projectile technology and arriving in environments where prey animals lacked co-evolved defensive behaviors, rapidly decimated these populations. Proponents of overkill point to the stark chronological correlation: in Australia, the Americas, and Madagascar, the arrival of humans is closely followed by abrupt megafaunal collapse. Furthermore, mathematical models of predator-prey dynamics demonstrate that even a small, slowly growing population of human hunters could hunt a slow-reproducing megafauna population to extinction within a few centuries. The sheer unprecedented speed of these extinctions, coupled with their occurrence across diverse climatic zones—from the arctic tundra to tropical rainforests—strongly implicates the sudden introduction of a novel super-predator rather than gradual ecological shifts. While climate fluctuations certainly occurred, they had been a regular feature of the Pleistocene for hundreds of thousands of years without causing mass extinctions; it is the unique variable of human expansion that distinguishes this final extinction event.

Passage B
For decades, the narrative allure of the overkill hypothesis has overshadowed significant deficiencies in its archaeological foundation. If human predation were the primary driver of Pleistocene megafaunal extinctions, one would expect the archaeological record to be replete with "kill sites" demonstrating the systematic slaughter of these animals. Yet, definitive evidence of human hunting in the Americas, for example, is restricted to a handful of species, primarily mammoths and mastodons, leaving the extinction of dozens of other megafaunal species—such as giant ground sloths and saber-toothed cats—archaeologically unlinked to human activity. Instead, a more robust explanation lies in the severe and rapid climate oscillations that characterized the Pleistocene-Holocene transition. As the last glacial period ended, profound shifts in temperature and precipitation drastically altered vegetation patterns, stripping away the mosaic environments and shrinking the specialized habitats upon which megafauna relied. This ecological fragmentation would have placed severe nutritional stress on large herbivores, collapsing food webs and driving extinctions regardless of human presence. The relatively sparse evidence of hunting more likely reflects opportunistic scavenging or the localized hunting of populations already fatally compromised by environmental collapse.

Based on the passages, how would the author of Passage A most likely respond to the assertion in Passage B that ecological fragmentation would have driven extinctions "regardless of human presence"?

A comprehensive survey of professional musicians revealed a strong correlation: musicians who regularly incorporate improvisation into their practice routines experience significantly lower levels of performance anxiety compared to those who practice exclusively with written sheet music. Based on this data, the researchers conclude that the act of practicing improvisation actively diminishes performance anxiety by teaching musicians how to adapt to unexpected situations on stage.

Which of the following most accurately describes a logical flaw in the researchers' reasoning?

Until the discovery of hydrothermal vents in 1977 along the Galápagos Rift, marine biologists operated under the assumption that virtually all oceanic life ultimately derived its metabolic energy from solar radiation via photosynthetic primary producers. The hydrothermal vent communities, thriving at depths exceeding two thousand meters in complete darkness, upended this paradigm. At these abyssal rifts, tectonic activity expels mineral-rich fluids superheated to over three hundred degrees Celsius, laden with hydrogen sulfide. The primary producers anchoring these ecosystems are not plants or algae, but chemolithoautotrophic bacteria capable of oxidizing hydrogen sulfide to synthesize organic carbon compounds from dissolved carbon dioxide.

Among the most specialized fauna inhabiting these environments is the giant tube worm, Riftia pachyptila. Adult specimens of Riftia lack a mouth, gut, and digestive tract entirely, possessing neither the anatomical apparatus to ingest particulate organic matter nor the ability to filter feed. Instead, the worm derives its nutritional sustenance from billions of endosymbiotic sulfur-oxidizing bacteria housed within a specialized, highly vascularized internal organ termed the trophosome. To supply these endosymbionts with the chemical reactants necessary for chemosynthesis, Riftia utilizes a bright red, plume-like branchial organ that absorbs hydrogen sulfide, oxygen, and carbon dioxide directly from the surrounding seawater. The worm's unique hemoglobin molecules bind both oxygen and toxic hydrogen sulfide simultaneously with high affinity, transporting these dissolved gases through the closed circulatory system to the trophosome without sulfide poisoning the worm's cellular respiration.

Based on the passage, which of the following is an explicit characteristic of adult Riftia pachyptila specimens?

Five years ago, national health authorities replaced the traditional biopsy method for diagnosing Vaelen’s syndrome with a new biochemical blood test. Clinical trials conclusively established that the new blood test yields a significantly lower rate of false positives than the biopsy, while successfully identifying the exact same percentage of individuals who actually have the disease. Nevertheless, a recent audit of medical records revealed that since the widespread adoption of the blood test, a noticeably smaller proportion of patients receiving a positive test result actually suffer from Vaelen’s syndrome.

Which of the following, if true, most helps to resolve the apparent discrepancy?