Tüm alıştırma soruları

A marine biotechnology firm plans to use thermozyme-X, an enzyme extracted from deep-sea hydrothermal vent archaea, to accelerate industrial plastic recycling. In laboratory tests, thermozyme-X completely degraded unsorted polyolefin plastics at temperatures above 80°C within six hours. The firm concludes that deploying thermozyme-X in commercial recycling facilities will significantly lower overall operational costs compared to conventional sorting and mechanical recycling processes.

Which of the following are assumptions upon which the marine biotechnology firm's argument depends? Select all that apply.

While early planetary scientists assumed that smaller icy moons in the outer Solar System were geologically dead spheres incapable of generating internal heat, data from modern space probes revealed active cryovolcanism on Saturn's moon Enceladus. Specifically, spectral analysis of the plumes erupting from the moon's south polar region confirmed the presence of water vapor, simple organic molecules, and salts, indicating a subsurface liquid ocean in direct contact with a rocky core. This discovery has led astrobiologists to revise traditional models of habitability, shifting focus from a planet's distance from its star to the energy dynamics generated by tidal flexing.

Which of the following best describes the function of the second sentence in the passage?

To reduce operational costs and improve network reliability, a telecommunications provider plans to replace all existing copper wire infrastructure in rural districts with fiber-optic cables over the next two years. Corporate executives argue that this upgrade will significantly boost net operating profits from rural service within three years, noting that fiber-optic infrastructure requires 70 percent less routine maintenance than copper and supports higher bandwidth subscriptions. Consequently, the executives conclude that the initial capital expenditure will be quickly offset by reduced maintenance expenses and increased subscription revenues.

Which of the following statements, if true, most seriously weakens the corporate executives' argument?

A logistics company recently provided ergonomic mechanical keyboards to all data-entry clerks at its main fulfillment facility, while clerks at its secondary facility continued using standard keyboards. Over the following six months, reported cases of repetitive wrist strain at the main facility dropped by 40 percent compared to the previous year, whereas reported cases at the secondary facility remained unchanged. Management concluded that replacing standard keyboards with ergonomic mechanical keyboards was responsible for the reduction in wrist strain injuries. Which of the following, if true, most seriously weakens the management's argument?

A municipal public transit agency recently installed high-definition security cameras in all city buses to decrease instances of vandalism. Following the installation, reported cases of vandalism aboard buses dropped by forty percent over a six-month period. Consequently, transit officials concluded that the visible presence of the new cameras successfully deterred potential vandals from committing crimes on the buses.

Which of the following statements, if true, provides the strongest support for the transit officials' conclusion?

Complete the sentence by filling in the blank with a word that accurately reflects the cause-and-effect relationship established by the clue.

Passage:
For early twentieth-century astronomers, interstellar space was largely conceived as an unmeasurable void, primarily because optical telescopes could not penetrate the dense clouds of cosmic dust that obscured the Milky Way’s galactic plane. The advent of radio astronomy in the 1930s initially met with skepticism from a discipline entrenched in visual observation. However, the theoretical prediction of the 21-centimeter neutral hydrogen spectral line by H. C. van de Hulst in 1944, followed by its experimental detection by Harold Ewen and Edward Purcell in 1951, fundamentally transformed observational astrophysics. Rather than merely confirming the existence of interstellar gas, the detection of the 21-centimeter line provided astronomers with a powerful diagnostic tool capable of mapping the spiral structure of the Milky Way through cosmic dust clouds. Consequently, radio astronomy transitioned from a peripheral engineering curiosity to a central discipline of modern astrophysics. By demonstrating that non-optical electromagnetic radiation could unveil previously invisible galactic structures, Ewen and Purcell’s empirical breakthrough invalidated the assumption that optical observational boundaries defined the limits of cosmic inquiry.

Based on the passage, which of the following statements accurately express the main idea or primary purpose of the text? Select all that apply.

While nineteenth-century evolutionary theorist Richard Owen's concept of the 'archetype' has frequently been dismissed by modern biologists as a vestige of transcendental idealism, a closer examination of his anatomical treatises reveals a far more pragmatically nuanced framework. Owen did not merely posit an immutable ideal form existing in the divine mind; rather, he deployed the archetype as a heuristic abstraction—a structural benchmark against which functional adaptations could be systematically calibrated. Critics who view his insistence on underlying structural homology as an impediment to Darwinian natural selection overlook how his detailed morphological mappings actually provided the empirical taxonomy upon which subsequent evolutionary logic relied. Granted, Owen's stubborn resistance to a purely mechanistic mechanism of descent ultimately led him into teleological obfuscations that compromised the explanatory power of his late work. Nevertheless, reducing his structuralist paradigm to mere metaphysical retrogression fails to appreciate how his methodology successfully mediated between rigid functionalism and emerging evolutionary concepts.

Which of the following best characterizes the author's overall attitude toward Richard Owen's concept of the 'archetype'?

Passage:
For decades, economic historians of the Byzantine Empire interpreted Justinian I’s sixth-century nationalization of the silk industry through the critical lens of Procopius’s Secret History, framing imperial intervention as a predatory fiscal monopoly that stifled private merchant enterprise. This conventional narrative posited that by capping retail prices and commandeering raw silk imports, the imperial court systematically impoverished provincial weavers in coastal Syria and Phoenicia to enrich palace workshops. However, recent quantitative re-examinations of provincial lead seals and administrative papyri suggest a far more nuanced economic reality. Rather than imposing absolute state ownership, Justinian’s edicts aimed primarily to stabilize volatile import expenditures amidst geopolitical disruption on the Persian frontier, establishing price ceilings to curb hyperinflation rather than eradicate private trade. Furthermore, archaeological evidence from provincial textile centers demonstrates that local artisan guilds retained considerable operational autonomy, adapting to state regulations by specializing in non-regulated secondary silk blends. Consequently, contemporary scholarship increasingly views imperial silk policies not as an unmitigated totalitarian takeover, but as a pragmatic, albeit heavy-handed, crisis-management mechanism designed to maintain fiscal equilibrium across a fractured monetary landscape.

Which of the following statements accurately describe a primary purpose or central argument presented in the passage? Select all that apply.

During the mid-Holocene, between approximately 11,000 and 5,000 years ago, changes in Earth’s orbital configuration enhanced the North African summer monsoon, transforming much of the present-day Sahara into a landscape of lakes, savannahs, and grasslands. The collapse of this 'Green Sahara' has long served as a focal point for paleoclimatologists examining non-linear climate dynamics. Traditional models attributed the abrupt desiccation around 5,500 years ago primarily to strong biogeophysical feedbacks: as insolation gradually declined, reduced precipitation caused land-surface albedo to increase as vegetation withered, which in turn further suppressed monsoonal circulation. However, recent high-resolution sediment analyses from offshore coastal sites suggest that the transition was far less uniform across space and time than previously presumed. While certain inland lacustrine records demonstrate sharp, step-like hydrological drops, coastal marine cores reveal a surprisingly protracted, time-transgressive decay in vegetation cover spanning several centuries. This spatial heterogeneity indicates that local groundwater buffering and topographical microclimates likely mediated the regional response to declining orbital forcing. Consequently, paleoclimatologists now caution against treating the Sahara's desiccation as a single, synchronized tipping point driven solely by vegetation-albedo coupling.

Consider each of the choices separately and select all that apply.

Which of the following can be inferred from the passage regarding the mid-Holocene desiccation of the Sahara?

Recent lead isotope analyses of lead ingots recovered from third-century BCE Mediterranean shipwrecks have challenged long-standing assumptions regarding Roman mineral procurement. Historically, economic historians posited that Iberian mines supplied virtually all industrial lead used across the central Republic. However, isotopic signatures from newly analyzed cargo off Sardinia match galena deposits in the Aegean rather than Hispania. Furthermore, processing marks on these ingots indicate standardized refining techniques unique to Attic smelting facilities. Although Iberian mining undeniably expanded during the Punic Wars, these maritime artifacts prove that eastern Mediterranean trade networks remained fundamental suppliers of heavy metals during the middle Republic. Consequently, scholars must revise models that treat western Mediterranean conquest as the sole catalyst for Roman industrial resource acquisition.

Based on the passage, which of the following statements represent main claims or central conclusions supported by the author's argument? Select all that apply.

For decades, evolutionary biologists analyzing deep-sea bioluminescence posited that light production in bathypelagic organisms evolved almost exclusively as a mechanism for predator deterrence or counterillumination camouflage. This prevailing framework, anchored in mid-twentieth-century observations of coastal teleosts, treated bioluminescent displays as immediate survival adaptations tailored to specific photic conditions. However, recent phylogenomic analyses combined with high-resolution oceanic imaging have challenged this reductive paradigm. Contemporary researchers demonstrate that in several clades of bathypelagic cephalopods and cnidarians, bioluminescence mechanisms originated prior to the diversification of modern visual predators. Furthermore, structural variations in luciferin-luciferase reaction pathways suggest that light production initially functioned as a metabolic byproduct of reactive oxygen species detoxification during periods of oceanic hypoxia, only later becoming exapted for intercellular signaling and visual camouflage. Consequently, the historical emphasis on purely visual-ecological drivers has obscured the complex physiological pre-adaptations that preceded the behavioral utility of marine luminescence.

Based on the passage above, which of the following accurately express the main ideas or primary purposes of the text? Select all that apply.

When Cecilia Payne published her 1925 doctoral dissertation on stellar atmospheres, her determination that hydrogen was overwhelmingly the most abundant element in stars was met with profound skepticism by the astronomical establishment. At the time, mainstream astrophysics, led by figures such as Henry Norris Russell, operated under the assumption that the elemental composition of stellar atmospheres closely mirrored that of Earth. To account for the disproportionately strong absorption lines of hydrogen observed in stellar spectra without abandoning terrestrial elemental ratios, prevailing models attributed spectral intensity primarily to thermal excitation conditions rather than actual elemental abundance. Payne’s rigorous application of Meghnad Saha’s ionization theory allowed her to decouple line intensity from relative abundance, demonstrating that line strength was a function of both temperature and chemical concentration. Although Russell initially persuaded Payne to frame her conclusion regarding hydrogen abundance as likely spurious, he subsequently published independent calculations confirming her findings. Consequently, while Payne is now recognized for discovering the chemical makeup of stars, contemporary historians argue that the initial resistance to her work stemmed less from institutional bias than from an entrenched theoretical commitment to terrestrial compositional parity.

Which of the following can be inferred from the passage regarding mainstream astrophysics prior to Payne���s 1925 dissertation?

Although the novel statute was formally enacted, legal scholars noted that traditional customary practices continued to ________ in the rural provinces, rendering the central government's decree largely ineffective. Which of the following words, if inserted into the blank, logically complete the sentence? Select all that apply.

To reduce emergency room overcrowding, a city's health department opened several free outpatient clinics in low-income neighborhoods. Six months later, emergency room visits among low-income residents had increased by 12 percent. Consequently, municipal auditors concluded that the clinic program failed to reduce emergency room usage. Health administrators maintain, however, that the program is effectively accomplishing its intended goal.

Which of the following, if true, provides the strongest support for the health administrators' position?

Complete the passage by providing the exact idiomatic phrases that correctly fill each blank.

The chief archivist maintained an uncompromising stance regarding document preservation; she would ________ no handling of fragile manuscripts without protective gloves, regardless of a researcher's seniority. Which of the following words, if substituted into the blank, best completes the meaning of the sentence?

Far from being __________, the diplomat's private correspondence revealed a deliberate strategy of calculated ambiguity, intended to keep foreign ministers uncertain of his nation's true intentions.

Which two answer choices, when inserted into the sentence, produce completed sentences that are equivalent in meaning?

In her reevaluation of early twentieth-century architectural preservationists, Dr. Evelyn Chen rejects the common characterization of their efforts as mere nostalgia. While contemporary detractors dismissed these early advocates as sentimental obstructionists intent on freezing urban landscapes in amber, Chen argues that their campaigns represented a pragmatic, forward-looking resistance to speculative real estate development. By detailing how preservationists leveraged municipal zoning codes to protect working-class neighborhoods, Chen demonstrates that their stance was far from passive retreat; rather, it constituted a deliberate intervention designed to channel urban growth toward social utility.

In the passage, the word "nostalgia" is used primarily to establish a contextual tone that the author regards as which of the following?

If $(5.0 \times 10^{-4}) \times (4.0 \times 10^{7}) = 2.0 \times 10^n$, what is the value of $n$?