All practice questions

Botanist Dr. Clara Martinez and colleagues investigated the ecological role of nickel hyperaccumulation in the plant *Alyssum bertolonii*. While many researchers hypothesize that accumulating high levels of toxic metals in leaves primarily serves to deter herbivores, Martinez's team proposed that it also functions as a form of elemental allelopathy. Specifically, they suggested that when nickel-rich leaves shed and decompose, they increase nickel concentrations in the topsoil directly beneath the plant's canopy, thereby suppressing the growth of competing, non-accumulator plant species.

Which choice, if true, would most directly support the team's proposal?

In the early 1990s, art restorers began utilizing laser ablation to clean fragile marble sculptures, a technique that vaporizes surface contaminants without damaging the underlying stone. This method offered unprecedented precision, allowing conservators to target micro-layers of soot that traditional chemical solvents could not safely remove. _______ the laser's thermal energy could be carefully calibrated to accommodate varying levels of stone degradation, ensuring that even structurally compromised sections of a sculpture remained undisturbed during the cleaning process.

Which choice completes the passage with the most logical transition?

Text 1
Many evolutionary biologists argue that human musicality is an evolutionary adaptation that functioned primarily to promote social cohesion and group bonding in early hominid communities. They emphasize that synchronized rhythmic activities, such as drumming and singing, trigger the release of endorphins and foster interpersonal trust among participants. Consequently, ancestral groups with strong musical traditions would have been more cooperative, unified, and better equipped to survive collective challenges. In this view, music-making is an evolutionary trait selected directly for its cooperative benefits.

Text 2
Cognitive scientists like Steven Pinker challenge this evolutionary view, characterizing music as a biological accident rather than an adaptation. They argue that music is a cultural technology that merely exploits pre-existing evolutionary developments, such as language processing, auditory scene analysis, and motor control. Because music does not directly increase individual reproductive success or survival, these researchers contend that treating it as a primary adaptation misinterprets the evolutionary process by confusing a pleasurable byproduct of other traits with a selected trait itself.

Based on the passages, how would the cognitive scientists discussed in Text 2 most likely characterize the claim in Text 1 that music-making was selected directly for its survival benefits?

Many modern architects design public urban spaces with the specific intention of fostering spontaneous social interaction among city residents. __________, the designers of the High Line park in New York City incorporated narrow pathways and closely clustered seating areas, both of which are layout features engineered to encourage visitors to converse.

Which choice completes the passage with the most logical transition?

The giant isopod (*Bathynomus giganteus*) is a deep-sea crustacean that inhabits the cold, benthic zones of the Atlantic, Pacific, and Indian Oceans. Because food is scarce in these deep-sea environments, *B. giganteus* has adapted to function as a scavenger, feeding primarily on the carcasses of fallen whales, fish, and squid. When food is abundant, the isopod can gorge itself to the point of compromising its locomotive ability. Conversely, when resources are depleted, *B. giganteus* can survive long periods of starvation. In laboratory settings, researchers observed that captive giant isopods could survive for over five years without consuming any food, relying on their highly efficient, slow metabolic rates to sustain vital bodily functions during extended periods of resource scarcity.

Based on the text, what is true of *Bathynomus giganteus* when resources are scarce in its environment?

Text 1
For decades, paleobotanists assumed that early angiosperms (flowering plants) coevolved in a mutually beneficial relationship with specialized insect pollinators during the Cretaceous period. According to this traditional view, the evolutionary emergence of complex flower structures directly catalyzed the rapid diversification of early bees and butterflies, as plants developed nectar guides and floral scents to attract specific insects, which in turn facilitated efficient pollination.

Text 2
In contrast, recent fossil evidence reveals that many specialized insect mouthparts suitable for flower feeding had already evolved millions of years before the first angiosperms appeared. Entomologist Dr. Kenji Sato argues that these early insects initially utilized these mouthpart structures to feed on gymnosperm secretions, suggesting that angiosperms did not initiate pollinator diversification but rather exploited existing insect adaptations that evolved earlier.

Based on the passages, how would Dr. Sato (the author of Text 2) most likely respond to the paleobotanists' view described in Text 1?

Biologists studying the vocalizations of the superb fairy-wren (*Malurus cyaneus*) observed that mothers sing a specific 'incubation call' to their unhatched eggs, teaching the embryos a unique acoustic password. Because nestlings must produce this password to receive food, researchers hypothesized that this vocal tutoring evolved exclusively as a defense against brood parasitism by Horsfield's bronze-cuckoos, whose eggs are laid later in the nesting cycle. ______ cuckoo chicks occasionally acquire the password by listening to the host mother's calls from within their own eggs, showing that this acoustic barrier is not impenetrable.

Which choice completes the text with the most logical transition?

Although early twentieth-century educators often warned that learning two languages simultaneously would confuse young children and stunt their cognitive growth, modern research has thoroughly _______ this notion, demonstrating instead that bilingualism enhances executive function and mental flexibility.

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

While preparing a presentation on the history of science, a student took the following notes:
* Biosemiotics is an interdisciplinary research field that investigates sign processes (semiosis) in living organisms.
* Semiosis is defined as the production, communication, and interpretation of signs and codes.
* The field was pioneered by biologist Jakob von Uexküll in the early twentieth century.
* Unlike traditional biology, which views organisms as passive chemical machines, biosemiotics treats them as active interpreters of their environments.

The student wants to provide a definition of biosemiotics that highlights how it differs from traditional biology. Which choice most effectively uses information from the given notes to accomplish this goal?

The search for life on Mars has long focused on the detection of methane ($CH_4$), a gas frequently associated with biological activity on Earth. In $2018$, NASA's Curiosity rover detected a seasonal spike in atmospheric methane, sparking intense debate among planetary scientists. While some researchers immediately posited that this fluctuation was evidence of microbial methanogenesis beneath the Martian surface, others urged caution, noting that abiotic processes could produce identical signatures. Specifically, reactions between water ($H_2O$) and olivine-rich rocks—a process known as serpentinization—can release methane under Martian conditions. Consequently, confirming the origin of Martian methane requires analyzing the carbon isotopes within the gas, rather than merely measuring its concentration.

Which choice best describes the function of the underlined sentence in the text as a whole?

While preparing a presentation on the administrative history of the Persian Empire, a student takes the following notes:
* The Persian Empire during the Achaemenid dynasty (c. $550\text{--}330$ BCE) established the Chapar Khaneh, an ancient express mail system.
* The system utilized a network of post stations positioned at regular intervals along the Royal Road, a highway spanning approximately $2{}500$ kilometers.
* Each station kept fresh horses and couriers ready to convey royal messages day and night without delay.
* Historian Herodotus wrote that the speed of these Persian messengers surpassed all other forms of land travel known in the ancient world.
* A $2024$ historical analysis by Dr. Anahita Rad compared message transmission times and showed that royal decrees sent via the Chapar Khaneh reached Susa from Sardis in $7$ days, whereas standard merchant caravans required $90$ days to travel the same distance.

The student wants to support Dr. Rad's comparative claim about the efficiency of the Chapar Khaneh relative to standard travel. Which choice most effectively uses information from the notes to accomplish this goal?

Complete the passage with the word that maintains a parallel structure within the sentence.

While preparing a presentation on traditional Japanese crafts, a student took the following notes:

* Kintsugi is a traditional Japanese art form.
* It is the practice of repairing broken pottery with a lacquer dusted or mixed with powdered gold, silver, or platinum.
* The term literally translates to "golden joinery."
* It originated in Japan during the late fifteenth century.
* Its philosophy treats breakage and repair as part of the history of an object, rather than something to disguise.

The student wants to introduce and define kintsugi to an audience unfamiliar with the craft. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Read the passage and fill in the blank with the transition word or phrase that best establishes the logical relationship between the sentences.

While researching ecological restoration techniques, a student took the following notes:
* The Miyawaki Method is an ecological restoration technique that focuses on planting dense, multi-layered native forests.
* The Miyawaki Method typically achieves canopy closure in 2 to 3 years and reaches maturity within 15 to 20 years.
* The Framework Species Method is a restoration technique that involves planting a select group of fast-growing trees to attract seed-dispersing wildlife.
* The Framework Species Method typically achieves canopy closure in 5 to 7 years and requires 30 to 50 years to reach maturity.
* Both methods prioritize the use of native species over exotic ones.

The student wants to contrast the timeline for canopy closure and maturity of the Miyawaki Method with those of the Framework Species Method. Which choice most effectively uses information from the given notes to accomplish this goal?

While preparing a presentation on the diet of the extinct Madagascar lemur *Megaladapis*, a student takes the following notes:
* *Megaladapis* was a genus of giant lemurs that went extinct approximately $500$ years ago.
* Some researchers hypothesized that as Madagascar’s climate became drier, *Megaladapis* adapted to feeding on plants in open grasslands.
* Plants using $C_3$ photosynthesis (dominant in closed canopy forests) have low stable carbon isotope ratios ($\delta^{13}\text{C}$), while plants using $C_4$ photosynthesis (dominant in open grasslands) have high $\delta^{13}\text{C}$ ratios.
* Paleontologist Dr. Karen Samonds measured the $\delta^{13}\text{C}$ levels in fossilized *Megaladapis* tooth enamel.
* The analysis revealed that *Megaladapis* enamel had consistently low $\delta^{13}\text{C}$ levels, matching those of modern leaf-eating lemurs that live in closed canopy forests.

The student wants to support the claim that *Megaladapis* fed on canopy forest plants rather than adapting to grassland vegetation. Which choice most effectively uses information from the notes to support this claim?

Having completed a detailed archaeological excavation of the ancient ruins, _______

Which choice completes the text so that it conforms to the conventions of Standard English?

In 1915, amateur astronomer George Willis Ritchey designed a reflecting telescope that utilized a hyperbolic primary mirror to eliminate spherical aberration. This innovative configuration ______ represented a monumental leap forward in optical engineering, though it remained largely unappreciated until the launch of the Hubble Space Telescope decades later.

Which choice completes the text so that it conforms to the conventions of Standard English?

If $x$ is the solution to the equation $\frac{1}{4}\left(\frac{2}{3}x - 8\right) - \frac{5}{6}\left(12 - \frac{3}{5}x\right) = \frac{1}{3}(x - 9) - 1$, what is the value of $\frac{1}{2}x - 5$?

Although the Swedish chemist Svante Arrhenius is often credited with first quantifying the greenhouse effect in 1896, other researchers had laid the groundwork decades earlier. Indeed, by the time Arrhenius published his landmark paper, other scientists—including the American investigator Eunice Newton Foote, whose pioneering experiments in 1856 demonstrated the heat-trapping properties of carbon dioxide—_________ already observed that the gas absorbs infrared radiation.

Which choice completes the text so that it conforms to the conventions of Standard English?