All practice questions

For decades, historical linguists hypothesized that the spread of the Indo-European language family was driven primarily by the migration of pastoralists from the Pontic-Caspian steppe, a view supported by archaeological evidence of horse domestication. However, an alternative model proposes that the language family expanded much earlier alongside the spread of agriculture from Anatolia. Recently, researchers have sought to resolve this debate by using phylogeographic tools to analyze genomic data from ancient human remains. Their findings suggest a hybrid model, wherein the language family originated in the Caucasus and split into two distinct branches that expanded via separate routes.

Which choice best describes the overall structure of the text?

In arid environments, some plant species exhibit phenological plasticity, adjusting the timing of their flowering to coincide with unpredictable rainfall events. Rather than relying on a strict seasonal calendar, these plants utilize chemical signals triggered by soil moisture to ________ their reproductive cycles with periods of water availability.

Which choice completes the text with the most logical and precise word or phrase?

Historian Dr. Margaret Billings claims that early American frontier diaries show that settlers prioritized community cooperation over individual independence during harsh winters. To investigate this, a researcher analyzed diaries written by settlers in Ohio during the exceptionally cold winter of 1812. Which choice from the analyzed diaries, if true, would most directly support Billings's claim?

In her study of ancient agricultural transitions in the Mediterranean, archaeologist Dr. Sofia Rossi investigated the subsistence strategies of the Bronze Age Nuragic civilization in Sardinia. Rossi hypothesized that when faced with prolonged periods of severe drought, Nuragic communities did not abandon their settlements or rely primarily on wild foraging; instead, they managed the environmental stress by shifting their domestic economy from crop cultivation to sheep and goat pastoralism, taking advantage of these animals' high tolerance for arid conditions.

Which finding, if true, would most directly support Rossi’s hypothesis?

For decades, linguistic anthropologists assumed that the transition of *Pirahã* speech into whistling during hunts served a purely utilitarian purpose: transmitting coordinates without alerting prey. However, Dr. Clara Mendoza’s recent auditory analysis challenges this consensus by showing that these whistle contours mirror the tonal pragmatics of emotional registers rather than spatial telemetry. To explain this divergence, Mendoza posits that the whistling acts as a ritualized social cohesive, reinforcing community bonds during high-stress activities. Although some traditionalists remain skeptical of Mendoza's communal hypothesis, her framework successfully accounts for the presence of emotional micro-inflections in the whistle signals, a phenomenon that the utilitarian model fails to explain.

Which choice best describes the overall structure of the text?

Many marine biologists assert that kelp forests play a vital role in coastal defense by reducing wave energy. To evaluate this claim, researchers measured wave heights before and after they passed through a dense kelp canopy off the coast of California. The study revealed that wave height decreased by up to sixty percent within the canopy, with denser sections providing the greatest reduction. Furthermore, the researchers found that this wave dampening significantly mitigates shoreline erosion in adjacent coastal zones. These findings confirm that kelp forests serve as a natural barrier, protecting coastlines from strong ocean waves.

Which choice best describes the overall structure of the text?

When a whale dies, its carcass sinks to the abyssal ocean floor, creating a localized, highly concentrated resource oasis known as a whale fall. In these nutrient-poor depths, a single whale fall can support a complex succession of ecological communities for decades. Initially, mobile scavengers like hagfish strip the soft tissue. Over time, opportunistic macroinvertebrates colonize the remaining bones and surrounding organic-rich sediment. Finally, sulfophilic bacteria decompose the bone lipids, producing hydrogen sulfide that fuels chemoautotrophic organisms. Thus, rather than being mere biological debris, whale falls function as critical hubs of biodiversity, facilitating the survival and dispersal of specialized deep-sea species that would otherwise perish in the barren benthic environment.

Which choice best states the main idea of the text?

In 1966, economists William Baumol and William Bowen proposed that while technological innovation drives productivity growth in manufacturing, sectors like the performing arts remain labor-intensive and resistant to such efficiencies. A string quartet still requires four musicians playing for the same duration as it did in the nineteenth century. Consequently, because performing arts organizations must increase salaries to compete for talent with higher-productivity industries despite experiencing no corresponding productivity gains, their operating costs rise disproportionately. Rather than reflecting mismanagement or declining audiences, this "cost disease" is an inevitable structural feature of service industries where human labor is the end product itself.

Which choice best states the main idea of the text?

Although evolutionary biologists historically viewed the relationship between host organisms and their microbiome as primarily adversarial, recent research reveals a more cooperative dynamic. Indeed, certain bacterial species do not merely coexist with their hosts; they actively ________ host physiological processes, such as digestion and immune response, to the point where the host's survival depends on these symbiotic interactions.

Which choice completes the text with the most logical and precise word or phrase?

Although ancient Greek tragedy is often remembered for its individual heroes, the chorus played a vital role in connecting the audience to the drama. The chorus, consisting of a group of actors who sang and danced in unison, did not merely witness the events of the play. Instead, they acted as a bridge, reflecting the community’s moral values and commenting on the actions of the main characters. By doing so, the chorus guided the audience's emotional and ethical responses to the unfolding tragedy, ensuring that the personal struggles of the heroes were understood within a broader social context.

Which choice best states the main idea of the text?

For centuries, historians assumed that the ancient trade networks of the Silk Road were exclusively overland routes, dismissing maritime routes as secondary. However, recent marine archaeological excavations off the coast of East Africa have uncovered shipwrecks containing late-antique pottery from the Mediterranean region. These physical discoveries suggest that maritime commerce was far more integrated into the global trade network during this era than previously believed. Consequently, scholars are now revising their models of ancient economic exchange to incorporate these maritime pathways, prompting a broader reevaluation of historical globalization.

Which choice best describes the overall structure of the text?

In the mid-twentieth century, classical economists assumed that human decision-making was entirely rational, governed by utility maximization. However, psychologist Herbert Simon challenged this foundational paradigm by introducing the concept of "bounded rationality," demonstrating that cognitive limits prevent perfect optimization. Recently, behavioral economists have expanded on Simon's framework by identifying specific heuristic biases that systematically skew consumer choices. Despite these empirical advances, some contemporary theorists argue that these modern models still fail to account for the crucial role of visceral emotional states in high-stakes financial environments.

Which choice best describes the overall structure of the text?

In behavioral economics, the concept of loss aversion describes how individuals experience the pain of losing something more intensely than the pleasure of gaining it. Early theorists hypothesized that this bias was an evolutionary adaptation, functioning to protect scarce resources. However, recent empirical studies suggest that loss aversion is not a universal human trait but rather a culturally contingent behavior, prompting researchers to ________ the assumption that it is a hardwired feature of human cognition.

Which choice completes the text with the most logical and precise word or phrase?

In historical linguistics, researchers analyze semantic drift—the evolution of word meanings over time. Linguist Dr. Evelyn Vance hypothesized that in medieval Europe, the adoption of modified semantic definitions for mechanical terms was primarily driven by geographical proximity to major shipping corridors rather than by the socioeconomic prestige of the adopting guilds. To test this hypothesis, Vance’s team mapped the usage of terms related to watermill technology across various European regions between 1200 and 1400 CE.

Which finding, if true, would most directly weaken Vance’s hypothesis?

Which choice completes the text with the most logical and precise word or phrase?

In his analysis of early-twentieth-century journalism, media historian Julian Mercer argues that while newspaper editors publicly celebrated investigative reporters as champions of the public interest, their private correspondence reveals a far more ______ attitude. In letters to board members, editors routinely complained about the legal fees generated by exposés and described crusading reporters not as heroes, but as reckless provocateurs who jeopardized the papers' financial stability.

Which choice completes the passage with the most logical and precise word?

For decades, historians attributed the abrupt decline of the Neo-Assyrian Empire in the seventh century BCE primarily to civil war and external invasions. However, recent high-resolution speleothem records from Kuna Ba Cave in northern Iraq have revealed a more complex catalyst: a severe, decades-long megadrought that began around 675 BCE, destabilizing the agricultural core that sustained the empire's urban centers. While military conflicts undoubtedly hastened the empire's collapse, these geopolitical crises were themselves exacerbated, if not initiated, by the catastrophic failure of the state's agrarian economy under extreme climatic stress. Thus, the downfall of Assyria was not merely a consequence of political instability, but rather a structural vulnerability exposed by environmental volatility.

Which choice best states the main idea of the text?

Although some historians initially dismissed the early use of steam engines in textile mills as a short-lived novelty, it soon became clear that the technology was not a ________ development. Within a few decades, steam power became the foundation of the Industrial Revolution, permanently transforming manufacturing and transportation on a global scale.

Which choice completes the text with the most logical and precise word or phrase?

Ecologist Elena Vance hypothesized that the presence of high-canopy trees in urban parks is the primary factor influencing the nesting density of American robins (*Turdus migratorius*). To test this hypothesis, Vance surveyed robin nesting habits across several parks of varying vegetation types. Which finding from Vance's survey, if true, would most directly support the hypothesis?

When an acacia tree is browsed by herbivores, such as giraffes, it releases ethylene gas into the air. This airborne chemical signal alerts neighboring acacia trees of the threat, prompting them to rapidly increase production of tannins in their leaves. Tannins are toxic chemicals that make the leaves unpalatable and potentially harmful to herbivores, deterring further feeding. By transmitting these chemical warnings, acacia trees coordinate a collective defense mechanism that helps protect the local tree population from excessive herbivore damage.

Which choice best states the main idea of the text?