Command of Evidence: Textual

Marine biologist Dr. Clara Silva investigated the impact of offshore wind farms on local benthic communities. Silva hypothesized that the artificial structures (the turbine foundations) serve as artificial reefs, attracting specific filter-feeding species like the blue mussel (*Mytilus edulis*) and subsequently increasing the density of their predators, such as the common starfish (*Asterias rubens*), on and immediately adjacent to the structures compared to surrounding sandy seabed areas.

Which choice, if true, would most directly support Silva's hypothesis?

Marine biologist Dr. Clara Vance and her team investigated how ocean acidification affects the shell-building behavior of the marine snail *Anachis avarosa*. The team exposed groups of snails to either current seawater pH levels or lower pH levels simulating projected ocean acidification. While overall calcification rates declined in the low-pH environment, Vance hypothesized that *Anachis avarosa* selectively allocates its limited calcium carbonate resources to preserve the structural integrity of the shell's apex—which shields vital internal organs—at the expense of the outer body whorl. Which finding from the team's study, if true, would most directly support Dr. Vance's hypothesis?

Many historians have argued that the adoption of currency in medieval Europe was driven primarily by merchant guilds seeking to facilitate long-distance trade. However, historian Dr. Evelyn Vance hypothesizes that local, small-scale transactions among peasant farmers played a far more critical role in the widespread adoption of minted coins. Vance claims that the regular usage of coinage was sustained not by high-value international commerce, but by the necessity of resolving micro-debts accrued through everyday mutual aid and agricultural cooperation within rural villages. Which choice, if true, would most directly support Vance's hypothesis?

Literary scholar Dr. Marcus Thorne argues that early twentieth-century modernist poetry in America, though often characterized as detached from daily life, frequently employed metaphors of industrial machinery to evoke intimate human emotions. Thorne contends that these poets used mechanical processes to represent the internal psychological states of their speakers, thereby bridging the divide between the impersonal modern world and personal experience.

Which choice, if true, would most directly support Thorne's argument?

In a study of remote workplace dynamics, organizational psychologist Dr. Valeria Rossi investigated the impact of 'micro-rewards'—small, digital tokens of recognition—on employee performance. Rossi hypothesized that while these rewards initially increase engagement, their frequent use eventually undermines intrinsic motivation, particularly for complex, creative tasks. However, she proposed that this negative effect is mitigated when the rewards are peer-nominated rather than system-generated, as peer recognition reinforces a sense of social connectedness that sustains motivation. Which choice, if true, would most directly support Rossi's hypothesis?

Companion planting is the agricultural practice of growing different crop species in close proximity to benefit one or both plants. Some researchers hypothesize that planting marigolds (*Tagetes*) alongside tomato plants (*Solanum lycopersicum*) protects the tomatoes from root-knot nematodes—microscopic pests that damage tomato root systems and reduce fruit yields. To test this hypothesis, the researchers compared tomato plants grown in fields with marigolds to tomato plants grown in fields without marigolds.

Which choice, if true, would most directly support the researchers' hypothesis?

Marine biologist Dr. Elena Rostova and colleagues investigated the resilience of giant kelp (*Macrocystis pyrifera*) to marine heatwaves. Some researchers hypothesize that kelp forests situated near deep-water submarine canyons are more resilient to ocean warming than those along shallow continental shelves because these canyons facilitate the upwelling of cool, nutrient-rich subsurface water, shielding the kelp from warm surface temperatures. Rostova’s team monitored kelp canopy health at several canyon-adjacent and shelf-adjacent sites during a major heatwave.

Which finding from Rostova’s study, if true, would most directly support the researchers' hypothesis?

In a study of Neolithic settlements in Southern Europe, archaeologist Dr. Angela Vyas investigated the transition from foraging to farming. Vyas hypothesized that this transition was not driven solely by local environmental changes, but was instead facilitated by an active regional network of cultural exchange that spread shared culinary traditions. To support this hypothesis, Vyas's team analyzed organic residues on pottery fragments from several geographically separated settlements dating back to the early agricultural era.

Which finding, if true, would most directly support Vyas's hypothesis?

Historian Dr. Evelyn Vance and her team investigated trade patterns in ancient Roman Britain by examining the distribution of imported pottery (terra sigillata). Some scholars argue that rural settlements acquired these goods exclusively from larger urban markets. Vance, however, hypothesized that rural communities participated in direct trade with regional merchants, bypassing urban intermediaries entirely.

Which finding, if true, would most directly support Vance's hypothesis?

In a study of the alpine wildflower *Silene acaulis*, ecologist Dr. Elena Rostova investigated the relationship between the plant's root exudates and mycorrhizal fungi. Rostova hypothesized that *S. acaulis* alters the chemical composition of its root exudates to recruit specific nitrogen-fixing fungi only when soil nitrogen levels are depleted. Which choice, if true, would most directly support Rostova's hypothesis?

In marine ecosystems, the California sea hare (*Aplysia californica*) defends itself against predators such as spiny lobsters by secreting a sticky, purple ink containing the compound opaline. Marine biologist Dr. Elena Rossi hypothesized that opaline does not function as a physical barrier or a systemic toxin, but rather acts as a chemical disruptor that temporarily disables the predator's chemosensory organs, rendering them unable to locate food. Which finding from Rossi's study, if true, would most directly support her hypothesis?

Ecologist Dr. Keith Sterling and colleagues investigated the relationship between mature Douglas fir trees (*Pseudotsuga menziesii*) and surrounding understory seedlings in a forest ecosystem. Some researchers have proposed that mature trees actively facilitate the growth of conspecific seedlings (seedlings of the same species) over heterospecific seedlings (seedlings of other species) by transferring carbon through shared underground mycorrhizal networks. Which finding, if true, would most directly support the researchers' proposal?

In the extreme environments of deep-sea hydrothermal vents, the giant tube worm *Riftia pachyptila* relies entirely on a symbiotic relationship with chemolithoautotrophic bacteria housed in an organ called the trophosome. These bacteria oxidize hydrogen sulfide ($\text{H}_2\text{S}$) from the vent fluid to produce organic molecules for the worm. Biologist Dr. Sunita Alvarez hypothesized that the metabolic rate of these endosymbiotic bacteria is primarily regulated by the availability of dissolved $\text{H}_2\text{S}$ in the surrounding water rather than by fluctuations in the ambient water temperature. Alvarez and her team monitored several *Riftia pachyptila* colonies near a vent field in the East Pacific Rise, recording bacterial metabolic activity under varying environmental conditions.

Which choice, if true, would most directly support Alvarez's hypothesis?

Linguists Dr. Keith Sterling and colleagues studied the phenomenon of phonetic attrition—the gradual loss of distinct consonant sounds over generations—in isolated island communities. Traditional models suggest that phonetic attrition is primarily accelerated by bilingualism and contact with larger, dominant language groups. Sterling's team, however, hypothesized that phonetic attrition can occur rapidly even in monolingual populations if the physical environment imposes high acoustic scattering. They argue that dense, humid forest canopies naturally muffle high-frequency sounds, leading speakers to subconsciously favor lower-frequency, more resilient consonant contrasts over time. Which finding from Sterling's study, if true, would most directly support the team's hypothesis?

In many North American forests, the invasive shrub *Lonicera maackii* (Amur honeysuckle) has largely replaced native understory plants. Ecologist Dr. Karen Cho and her team hypothesized that nesting in *L. maackii* increases the predation risk for native songbirds. According to Cho, the rigid, upright branch architecture of *L. maackii* prevents birds from building nests at the higher, more secure heights they typically select in native shrubs, thereby leaving the nests accessible to ground-dwelling predators. Which choice, if true, would most directly support Cho’s hypothesis?

Lima bean plants (*Phaseolus lunatus*) release volatile organic compounds (VOCs) when damaged by herbivorous spider mites. While some scientists suggest these emissions function primarily as a general warning signal to alert neighboring plants of impending danger, ecologist Dr. Sandra Keller hypothesizes that the plants actively customize the chemical profile of their VOCs to recruit predatory mites (*Phytoseiulus persimilis*), which prey on spider mites.

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

Sociologist Dr. Liam O'Connor and colleagues investigated the social impact of urban "pocket parks"—small public green spaces built on single vacant lots. O'Connor hypothesized that pocket parks with active community-led stewardship, such as neighborhood-organized planting groups, foster stronger local social cohesion than pocket parks maintained exclusively by municipal government workers. To test this hypothesis, the researchers surveyed residents living within a two-block radius of various pocket parks.

Which choice, if true, would most directly support O'Connor and colleagues' hypothesis?

In archaeology, the transition from foraging to cultivation in the Levant during the Younger Dryas (c. 12,900–11,700 BP) is often modeled as a desperate response to resource scarcity. However, archaeologist Dr. Liam Vance argues that early cultivation was not a forced adaptation to dwindling resources, but a deliberate strategy to secure prestige foods for social competitive feasting during periods of relative stability. Which choice, if true, would most directly support Vance’s argument?

In zones of sympatry, where the breeding ranges of the indigo bunting (*Passerina cyanea*) and the lazuli bunting (*Passerina amoena*) overlap, the songs of male indigo buntings exhibit a distinct shift in frequency, diverging from those of lazuli buntings. Ecologist Dr. Ananya Sen hypothesized that this acoustic character displacement is driven solely by female mate selection—specifically, to avoid hybridization—rather than by male-male territorial competition. As evidence, Sen highlights playtests showing that sympatric male indigo buntings respond with equivalent levels of territorial aggression to playbacks of both species' songs, indicating that males do not use song frequency to differentiate between species during territorial defense.

Which finding, if true, would most directly weaken Sen's hypothesis?

Many plant species produce secondary metabolites to deter herbivores. Ecologist Elena Rostova and her team hypothesized that the subalpine shrub *Salix polaris* increases its production of salicylic acid—a defensive chemical—not as a direct response to physical leaf damage from herbivores, but rather in response to airborne chemical cues released by neighboring *Salix polaris* plants that are currently undergoing herbivore attacks. Which finding, if true, would most directly support the team's hypothesis?