Generated with Monsha

Save this resource to edit, expand, or export it, or create more resources for free.

SAT Reading & Writing Full Practice Test

SAT Practice Test
SAT
English

SAT Reading & Writing Full Practice Test

Question 1

Marine biologist Dr. Sarah Chen has spent the last decade studying coral reef ecosystems in the Pacific Ocean. Her research indicates that coral reefs, which cover less than one percent of the ocean floor, support approximately 25% of all marine species. These vibrant underwater cities face unprecedented threats from climate change, with rising ocean temperatures causing widespread coral bleaching events. Chen's latest findings suggest that some coral species possess remarkable adaptive capabilities, developing heat-resistant symbiotic algae that allow them to survive in warmer waters. This discovery offers hope for reef conservation efforts, though Chen emphasizes that reducing global carbon emissions remains the most critical factor in preserving these biodiversity hotspots for future generations.
Based on the passage, which statement best describes the relationship between coral reefs and marine biodiversity?
A. Coral reefs contain exactly 25% of the ocean's total biodiversity across all ecosystems.
B. Despite occupying a small fraction of ocean space, coral reefs provide habitat for a disproportionately large percentage of marine species.
C. Marine species diversity is evenly distributed across all ocean floor environments.
D. Coral reefs support marine life primarily through their extensive coverage of ocean floor area.

Question 2

The concept of 'flow state' was first introduced by psychologist Mihaly Csikszentmihalyi in the 1970s. He described it as a mental state where individuals become fully immersed in an activity, experiencing complete focus and energized concentration. During flow, people report losing track of time and feeling that their actions and awareness merge seamlessly. Athletes often describe this phenomenon when performing at their peak—every movement feels effortless and automatic. Musicians, artists, and even surgeons have reported similar experiences during their most successful performances. Csikszentmihalyi's research suggests that flow occurs when there's an optimal balance between the challenge level of a task and an individual's skill level. Too easy, and boredom sets in; too difficult, and anxiety takes over.
The author uses the examples of athletes, musicians, artists, and surgeons primarily to
A. demonstrate that flow state is limited to creative and physical professions.
B. illustrate the widespread applicability of flow state across diverse professional domains.
C. compare the relative intensity of flow experiences in different careers.
D. suggest that some professions are more likely to achieve flow than others.

Question 3

Urban gardening has gained tremendous popularity in recent years, particularly among city dwellers seeking to reconnect with nature and grow their own food. Community gardens, rooftop farms, and vertical growing systems have transformed vacant lots and unused spaces into productive green areas. These initiatives not only provide fresh produce but also foster community connections and environmental awareness. Many urban gardeners report that tending to plants offers stress relief and a sense of accomplishment. The movement has also sparked innovation in sustainable agriculture techniques, including hydroponics, aquaponics, and companion planting methods that maximize yield in limited spaces.
Which choice completes the text with the most logical and precise word or phrase?
A. These initiatives not only provide fresh produce but also foster community connections and environmental awareness.
B. These initiatives not only provide fresh produce, but they also foster community connections and environmental awareness.
C. These initiatives not only provide fresh produce; but also foster community connections and environmental awareness.
D. These initiatives not only provide fresh produce, but also fostering community connections and environmental awareness.

Question 4

The ancient Library of Alexandria, established in the 3rd century BCE, represented humanity's first attempt at creating a universal repository of knowledge. Scholars from across the Mediterranean world gathered there to study mathematics, astronomy, medicine, and philosophy. The library's collection reportedly contained hundreds of thousands of scrolls, making it the largest collection of written works in the ancient world. However, the library's decline was gradual rather than sudden. Various factors contributed to its eventual disappearance: reduced funding from successive rulers, the rise of Christianity which viewed pagan learning with suspicion, and the shift of intellectual centers to other cities like Constantinople and Baghdad. By the time Arab forces conquered Alexandria in 641 CE, the library had already lost much of its former glory.
The writer wants to add a sentence that effectively transitions from the library's peak to its decline. Which choice most effectively accomplishes this goal?
A. Unfortunately, this golden age of learning would not last forever.
B. The library attracted scholars who made groundbreaking discoveries in their fields.
C. Alexandria's strategic location made it an ideal center for international scholarship.
D. Many modern universities trace their organizational structure back to Alexandria's model.

Question 5

Recent studies in neuroscience have revealed fascinating insights about how bilingual individuals process language. When bilingual speakers use their second language, brain imaging shows increased activity in the prefrontal cortex, the region responsible for executive control and decision-making. This heightened neural activity suggests that managing two languages simultaneously requires significant cognitive resources. Interestingly, this constant mental exercise appears to strengthen the brain's executive functions over time. Research indicates that bilingual individuals often outperform monolinguals on tasks requiring attention control, working memory, and cognitive flexibility. Some studies even suggest that bilingualism may delay the onset of dementia and other age-related cognitive decline by several years, though researchers caution that more longitudinal studies are needed to confirm these protective effects.
According to the passage, what does the increased prefrontal cortex activity in bilingual speakers suggest?
A. Bilingual individuals have larger prefrontal cortex regions than monolinguals.
B. Second language use creates permanent changes in brain structure.
C. Managing multiple languages demands considerable cognitive effort.
D. The prefrontal cortex is the primary location where languages are stored.

Question 6

In her groundbreaking novel 'The Left Hand of Darkness,' science fiction author Ursula K. Le Guin created a world where inhabitants are neither male nor female most of the time, but can become either sex during certain periods. This innovative concept wasn't merely a fantastical element; it served as a powerful tool for examining gender roles and assumptions in human society. By removing familiar gender categories, Le Guin forced readers to question their own preconceptions about masculinity, femininity, and the behaviors typically associated with each. The novel's protagonist, a human ambassador visiting this alien world, must navigate not only political complexities but also his own deeply ingrained gender-based expectations. Through this narrative device, Le Guin demonstrated how science fiction could serve as more than entertainment—it could function as a lens for social critique and philosophical exploration.
In the context of the passage, the phrase 'This innovative concept wasn't merely a fantastical element' primarily serves to
A. distinguish Le Guin's work from other science fiction novels of her era.
B. emphasize that the gender concept has deeper thematic significance beyond its surface novelty.
C. suggest that the novel's success depends more on its ideas than its storytelling.
D. imply that most science fiction concepts lack meaningful social commentary.

Question 7

The phenomenon known as 'urban heat islands' occurs when cities experience significantly higher temperatures than surrounding rural areas. This temperature difference, which can be as much as 10 degrees Fahrenheit, results from several factors. Dark surfaces like asphalt and concrete absorb and retain heat more effectively than natural vegetation. Additionally, the lack of trees and green spaces means less cooling through evapotranspiration. Buildings and vehicles also generate heat directly through energy consumption. To combat this effect, many cities are implementing green infrastructure solutions: installing green roofs, increasing tree canopy coverage, and using lighter-colored materials for roads and buildings.
Which choice provides the most effective transition between the two sentences?
A. This temperature difference, which can be as much as 10 degrees Fahrenheit, results from several factors:
B. This temperature difference, which can be as much as 10 degrees Fahrenheit, results from several factors.
C. This temperature difference—which can be as much as 10 degrees Fahrenheit—results from several factors.
D. This temperature difference (which can be as much as 10 degrees Fahrenheit) results from several factors:

Question 8

The art of origami, the Japanese practice of paper folding, has evolved far beyond its traditional ceremonial and decorative purposes. Modern origami artists push the boundaries of what's possible with a single sheet of paper, creating incredibly complex sculptures that rival works made with conventional art materials. Mathematical principles underlying origami have found applications in fields ranging from aerospace engineering to medical device design. NASA has used origami-inspired folding patterns to design solar panels that can be compactly stored during space travel and then unfold to full size in orbit. Similarly, medical researchers have developed origami-based stents that can be inserted into blood vessels in a compressed form and then expand to support arterial walls.
The writer is considering adding the following sentence after the second sentence: 'These contemporary works often require hundreds of precise folds and can take weeks or months to complete.' Should the writer make this addition?
A. Yes, because it provides specific details that support the claim about the complexity of modern origami.
B. Yes, because it explains why origami has become popular in scientific applications.
C. No, because it contradicts the passage's focus on origami's practical applications.
D. No, because it shifts attention away from the mathematical principles mentioned later.

Question 9

Researchers studying sleep patterns have discovered that the timing of our sleep-wake cycles is controlled by an internal biological clock located in the brain's hypothalamus. This circadian rhythm, which runs on approximately a 24-hour cycle, is influenced by environmental cues, particularly light exposure. When light hits the retina, it sends signals to the hypothalamus, which then regulates the production of melatonin, a hormone that promotes sleepiness. In the absence of light, melatonin levels rise, making us feel drowsy. However, artificial light from electronic devices can disrupt this natural process. The blue light emitted by smartphones, tablets, and computers is particularly problematic because it closely mimics natural daylight, effectively tricking the brain into thinking it's still daytime and suppressing melatonin production.
Which choice best describes the function of melatonin as presented in the passage?
A. It serves as the primary mechanism by which light signals reach the hypothalamus.
B. It acts as a sleep-promoting hormone whose production is regulated by light exposure.
C. It functions as the internal biological clock that maintains circadian rhythms.
D. It processes environmental light cues and converts them into neural signals.

Question 10

The concept of 'food miles'—the distance food travels from production to consumption—has become a popular metric for environmentally conscious consumers. At first glance, choosing locally grown produce seems like an obvious way to reduce carbon emissions and support sustainable agriculture. However, the relationship between food miles and environmental impact is more complex than it initially appears. A study comparing greenhouse gas emissions found that transportation typically accounts for only 4% of food's total carbon footprint. Production methods, seasonal growing conditions, and storage requirements often have far greater environmental impacts than distance traveled. For example, tomatoes grown locally in heated greenhouses during winter may have a larger carbon footprint than tomatoes imported from warmer climates where they can grow naturally outdoors.
The author mentions the tomato example primarily to
A. demonstrate that imported foods are always more environmentally friendly than local foods.
B. illustrate how production methods can outweigh transportation distance in environmental impact.
C. argue that consumers should avoid eating tomatoes during winter months.
D. show that greenhouse farming is inherently unsustainable compared to outdoor farming.

Question 11

The ancient practice of beekeeping, also known as apiculture, has experienced a remarkable resurgence in urban environments. City dwellers are increasingly drawn to maintaining bee colonies on rooftops, in community gardens, and even on apartment balconies. This trend reflects growing awareness of bees' crucial role in pollinating plants and supporting biodiversity. Urban beekeepers often report that their bees produce honey with unique flavors that reflect the diverse flowering plants found in city landscapes. However, successful urban beekeeping requires careful attention to local regulations, proper hive placement, and ongoing education about bee behavior and colony management.
Which choice maintains the most consistent style and tone with the rest of the passage?
A. Urban beekeepers often report that their bees produce honey with unique flavors that reflect the diverse flowering plants found in city landscapes.
B. Urban beekeepers are like, totally amazed by how their bees make honey that tastes different because of all the various flowers in the city.
C. It's pretty cool how urban beekeepers find that their bees create honey with distinctive flavors from the many different flowers growing in urban areas.
D. Urban beekeepers frequently observe that their colonies generate honey possessing distinctive organoleptic properties derived from the heterogeneous urban flora.

Question 12

The development of electric vehicles represents a significant shift in automotive technology, driven by concerns about climate change and air pollution. Early electric cars faced major obstacles: limited driving range, long charging times, and insufficient charging infrastructure. However, recent advances in battery technology have dramatically improved vehicle performance and reduced costs. Lithium-ion batteries now provide ranges exceeding 300 miles on a single charge, while fast-charging stations can replenish batteries to 80% capacity in under 30 minutes. Major automakers have committed billions of dollars to electric vehicle development, with many planning to phase out internal combustion engines entirely within the next two decades.
The writer wants to conclude the passage with a sentence that logically follows from the information presented. Which choice most effectively accomplishes this goal?
A. Despite these improvements, electric vehicles still face challenges in cold weather conditions.
B. These technological and industrial developments suggest that electric vehicles are poised to become the dominant form of personal transportation.
C. The environmental benefits of electric vehicles depend largely on how the electricity used to charge them is generated.
D. Consumer acceptance of electric vehicles varies significantly across different demographic groups.

Question 13

Archaeologists working in Peru have uncovered evidence that the Inca civilization possessed sophisticated understanding of earthquake engineering centuries before modern seismic science emerged. The famous stone walls of Machu Picchu and other Inca sites were constructed using a technique called ashlar masonry, where stones are cut to fit together so precisely that no mortar is needed. During earthquakes, these walls can flex and move without collapsing, as the individual stones shift slightly and then resettle into place. This flexibility, combined with the walls' trapezoidal shape that distributes weight more effectively, has allowed many Inca structures to survive in one of the world's most seismically active regions. Modern engineers studying these techniques have incorporated similar principles into contemporary earthquake-resistant building designs, demonstrating how ancient knowledge continues to inform current architectural practices.
Based on the passage, what can be reasonably inferred about the relationship between ancient Inca building techniques and modern earthquake engineering?
A. Modern engineers have completely replaced traditional methods with superior contemporary techniques.
B. Ancient Inca builders had access to scientific instruments that modern engineers lack.
C. Traditional building methods developed through experience can offer valuable insights for contemporary engineering.
D. Earthquake-resistant construction was more advanced in ancient times than it is today.

Question 14

The phenomenon of 'phantom limb syndrome,' where amputees continue to feel sensations in missing limbs, has puzzled medical professionals for centuries. Initially dismissed as psychological, this condition is now understood to have neurological origins. When a limb is amputated, the brain regions that once processed signals from that limb don't simply shut down. Instead, they remain active, sometimes generating spontaneous nerve impulses that the brain interprets as coming from the missing limb. These sensations can range from mild tingling to severe pain. Recent research has shown that phantom limb syndrome occurs because the brain's neural maps are remarkably plastic—they can reorganize and adapt to new circumstances. Understanding this plasticity has led to innovative treatments, including mirror therapy, where patients use visual feedback to 'retrain' their brains and reduce phantom sensations.
The author's discussion of how phantom limb syndrome was 'initially dismissed as psychological' serves primarily to
A. criticize early medical professionals for their lack of scientific rigor.
B. highlight the evolution of medical understanding from misconception to scientific explanation.
C. demonstrate that psychological factors play no role in phantom limb syndrome.
D. establish that neurological conditions are always more serious than psychological ones.

Question 15

Marine protected areas (MPAs) have emerged as one of the most effective tools for ocean conservation. These designated zones restrict human activities such as fishing, mining, and development to allow marine ecosystems to recover and thrive. Studies have shown that well-managed MPAs can increase fish populations, restore coral reefs, and protect endangered species. The benefits extend beyond the protected boundaries: healthy marine ecosystems within MPAs often serve as nurseries for fish that later populate surrounding waters. However, the success of MPAs depends on several critical factors, including adequate size, proper enforcement, and community support from local stakeholders.
Which choice most effectively combines the underlined sentences?
A. The benefits extend beyond the protected boundaries, and healthy marine ecosystems within MPAs often serve as nurseries for fish that later populate surrounding waters.
B. The benefits extend beyond the protected boundaries; healthy marine ecosystems within MPAs often serve as nurseries for fish that later populate surrounding waters.
C. The benefits extend beyond the protected boundaries because healthy marine ecosystems within MPAs often serve as nurseries for fish that later populate surrounding waters.
D. The benefits extend beyond the protected boundaries, healthy marine ecosystems within MPAs often serve as nurseries for fish that later populate surrounding waters.

Question 16

The rise of social media has fundamentally altered how people consume and share news. Traditional gatekeepers like newspaper editors and television producers once controlled which stories reached the public, but now anyone with internet access can publish and distribute information instantly. This democratization of information has both positive and negative consequences. On one hand, social media platforms have given voice to marginalized communities and enabled rapid organization of social movements. On the other hand, the same platforms have facilitated the spread of misinformation and created echo chambers where people primarily encounter information that confirms their existing beliefs. The challenge for modern society is learning to harness the benefits of social media while mitigating its potential harms.
Which sentence would most effectively introduce the paragraph that follows this passage?
A. Social media companies have implemented various fact-checking measures to address misinformation.
B. Understanding how to navigate this new information landscape requires developing critical media literacy skills.
C. The economic impact of social media on traditional news organizations has been devastating.
D. Government regulation of social media platforms remains a controversial topic among policymakers.

Question 17

The human microbiome—the collection of trillions of bacteria, viruses, and other microorganisms living in and on our bodies—plays a crucial role in maintaining health. These microscopic inhabitants help digest food, synthesize vitamins, regulate immune responses, and even influence mood and behavior through the gut-brain axis. Recent research has revealed that the composition of an individual's microbiome is as unique as a fingerprint, shaped by factors including genetics, diet, environment, and early life experiences. Disruptions to the microbiome, often caused by antibiotic use, poor diet, or stress, have been linked to various health problems ranging from digestive disorders to autoimmune diseases. Scientists are now exploring how to restore and maintain healthy microbiome balance through targeted interventions such as probiotics, prebiotics, and fecal microbiota transplantation.
According to the passage, which of the following best describes the relationship between the microbiome and human health?
A. The microbiome primarily causes health problems that require medical intervention.
B. The microbiome performs essential functions for health, but disruptions can lead to disease.
C. The microbiome's effects on health are limited to digestive and immune functions.
D. The microbiome composition remains constant throughout an individual's lifetime.

Question 18

In recent years, the field of biomimicry has gained significant attention as scientists and engineers look to nature for innovative solutions to human challenges. This approach involves studying biological systems and processes to inspire the design of new technologies and materials. The results have been remarkable: Velcro was inspired by the way burr seeds stick to animal fur, bullet train designs were improved by studying the aerodynamics of kingfisher beaks, and self-cleaning surfaces were developed by examining lotus leaves. What makes biomimicry particularly valuable is that natural systems have been refined through millions of years of evolution, resulting in incredibly efficient and sustainable solutions. As we face pressing environmental challenges, biomimicry offers a pathway to develop technologies that work in harmony with natural systems rather than against them.
The phrase 'What makes biomimicry particularly valuable' primarily functions to
A. introduce a contrasting viewpoint about the limitations of biomimicry.
B. provide a transition to explaining why biomimicry is especially useful.
C. summarize the specific examples of biomimicry mentioned earlier.
D. question whether biomimicry is actually more effective than traditional approaches.

Question 19

Climate scientists studying ice core samples from Antarctica have discovered valuable information about Earth's atmospheric history. These cylindrical sections of ice, some dating back hundreds of thousands of years, contain trapped air bubbles that preserve ancient atmospheric conditions. By analyzing the chemical composition of these bubbles, researchers can determine past levels of greenhouse gases, temperature fluctuations, and even volcanic activity. The data reveals that current atmospheric carbon dioxide levels are higher than at any point in the last 800,000 years. This research provides crucial context for understanding modern climate change and helps scientists make more accurate predictions about future environmental conditions.
Which choice provides the best punctuation for the underlined portion of the text?
A. These cylindrical sections of ice, some dating back hundreds of thousands of years, contain trapped air bubbles that preserve ancient atmospheric conditions.
B. These cylindrical sections of ice; some dating back hundreds of thousands of years; contain trapped air bubbles that preserve ancient atmospheric conditions.
C. These cylindrical sections of ice—some dating back hundreds of thousands of years—contain trapped air bubbles that preserve ancient atmospheric conditions.
D. These cylindrical sections of ice (some dating back hundreds of thousands of years), contain trapped air bubbles that preserve ancient atmospheric conditions.

Question 20

The ancient art of storytelling has found new life in the digital age through podcasts, audiobooks, and interactive media. While the medium has evolved, the fundamental elements of compelling narratives remain unchanged: engaging characters, meaningful conflict, and emotional resonance. Modern storytellers must navigate additional considerations, however, such as shorter attention spans and competition from countless entertainment options. Successful contemporary narratives often incorporate multimedia elements, interactive features, and serialized formats that encourage ongoing engagement. The most effective digital stories maintain the timeless appeal of traditional storytelling while leveraging technology to create more immersive and personalized experiences for audiences.
The writer is considering deleting the underlined sentence. Should the writer make this deletion?
A. Yes, because it contradicts the passage's main argument about storytelling evolution.
B. Yes, because it introduces information that is not directly related to digital storytelling.
C. No, because it provides important context about the challenges facing modern storytellers.
D. No, because it explains why traditional storytelling methods are superior to digital ones.

Question 21

Vertical farming, the practice of growing crops in vertically stacked layers within controlled environments, represents a potential solution to several agricultural challenges. This method uses significantly less water than traditional farming through precise irrigation systems and can produce crops year-round regardless of weather conditions. Vertical farms can be established in urban areas, reducing transportation costs and providing fresh produce to city populations. However, the technology currently requires substantial energy inputs for LED lighting and climate control systems. Critics argue that the high energy consumption and initial setup costs make vertical farming economically unviable for many crops. Proponents counter that as renewable energy becomes cheaper and LED technology improves, vertical farming will become increasingly cost-effective while offering environmental benefits such as reduced pesticide use and elimination of agricultural runoff.
Which statement best summarizes the central tension presented in the passage regarding vertical farming?
A. Vertical farming produces higher crop yields than traditional methods but requires more skilled labor.
B. Vertical farming offers significant agricultural and environmental advantages but faces economic and energy challenges.
C. Vertical farming is suitable for urban areas but cannot replace rural agricultural production.
D. Vertical farming eliminates weather-related crop failures but increases food safety risks.

Question 22

The study of animal intelligence has undergone a dramatic transformation in recent decades. Once, scientists believed that complex cognitive abilities like problem-solving, tool use, and self-awareness were uniquely human traits. This anthropocentric view began to crumble as researchers documented remarkable behaviors across the animal kingdom. Crows fashion tools from twigs to extract insects from tree bark. Elephants recognize themselves in mirrors and mourn their dead. Dolphins use sponges as protective gear while foraging on the ocean floor. Octopuses solve multi-step puzzles and exhibit distinct personalities. These discoveries have forced scientists to reconsider fundamental questions about consciousness, intelligence, and what it means to be human. The implications extend beyond academic curiosity, influencing how we think about animal welfare, conservation efforts, and our relationship with the natural world.
The author's use of specific animal examples (crows, elephants, dolphins, octopuses) primarily serves to
A. demonstrate the superiority of certain species over others in cognitive abilities.
B. provide concrete evidence supporting the claim about widespread animal intelligence.
C. illustrate the different research methods used to study animal behavior.
D. compare animal intelligence levels to human cognitive capabilities.

Question 23

The development of renewable energy technologies has accelerated rapidly in recent years, driven by concerns about climate change and decreasing costs of solar and wind power. Solar panel efficiency has improved dramatically while manufacturing costs have plummeted, making solar energy competitive with fossil fuels in many markets. Wind turbines have grown larger and more efficient, capable of generating electricity even in areas with moderate wind speeds. Energy storage solutions, particularly lithium-ion batteries, have also advanced significantly, addressing one of renewable energy's main challenges: intermittency. These technological improvements, combined with supportive government policies and increasing corporate commitments to clean energy, have positioned renewable sources to play an increasingly dominant role in the global energy mix.
Which choice maintains parallel structure in the sentence?
A. These technological improvements, combined with supportive government policies and increasing corporate commitments to clean energy, have positioned renewable sources to play an increasingly dominant role in the global energy mix.
B. These technological improvements, combined with government policies that are supportive and increasing corporate commitments to clean energy, have positioned renewable sources to play an increasingly dominant role in the global energy mix.
C. These technological improvements, combined with supportive government policies and corporations increasingly committing to clean energy, have positioned renewable sources to play an increasingly dominant role in the global energy mix.
D. These technological improvements, combined with supportive government policies and corporate commitments to clean energy that are increasing, have positioned renewable sources to play an increasingly dominant role in the global energy mix.

Question 24

The concept of 'rewilding'—restoring ecosystems to their natural state by reintroducing native species and removing human interventions—has gained momentum among conservationists. Successful rewilding projects have demonstrated remarkable ecological benefits. The reintroduction of wolves to Yellowstone National Park in 1995 provides a compelling example. Wolves reduced deer populations, which allowed vegetation to recover along riverbanks. This vegetation growth stabilized soil, changed river patterns, and created habitat for numerous other species. The cascading effects extended throughout the ecosystem, illustrating how keystone species can restore ecological balance. However, rewilding projects face significant challenges, including conflicts with local communities, economic concerns, and the complexity of ecosystem restoration in landscapes altered by centuries of human activity.
To improve the cohesion of the paragraph, the writer wants to add a transition at the beginning of the sentence about challenges. Which choice most effectively accomplishes this goal?
A. However, rewilding projects face significant challenges, including conflicts with local communities, economic concerns, and the complexity of ecosystem restoration in landscapes altered by centuries of human activity.
B. Despite these successes, rewilding projects face significant challenges, including conflicts with local communities, economic concerns, and the complexity of ecosystem restoration in landscapes altered by centuries of human activity.
C. In addition, rewilding projects face significant challenges, including conflicts with local communities, economic concerns, and the complexity of ecosystem restoration in landscapes altered by centuries of human activity.
D. For example, rewilding projects face significant challenges, including conflicts with local communities, economic concerns, and the complexity of ecosystem restoration in landscapes altered by centuries of human activity.

Question 25

Recent advances in gene editing technology, particularly the CRISPR-Cas9 system, have opened new possibilities for treating genetic diseases. This molecular tool allows scientists to make precise changes to DNA sequences, potentially correcting genetic mutations that cause inherited disorders. Clinical trials are underway for treatments targeting sickle cell disease, beta-thalassemia, and certain forms of blindness. The technology works by using a guide RNA to direct the Cas9 enzyme to specific locations in the genome, where it can cut DNA strands and allow for targeted modifications. While early results are promising, researchers emphasize that gene editing treatments must undergo rigorous testing to ensure safety and efficacy. Ethical considerations also remain important, particularly regarding the potential for genetic modifications that could be passed to future generations.
Based on the passage, what is the primary function of guide RNA in the CRISPR-Cas9 system?
A. It cuts DNA strands at specific locations to enable genetic modifications.
B. It directs the Cas9 enzyme to precise locations within the genome.
C. It repairs genetic mutations that cause inherited disorders.
D. It prevents genetic modifications from being passed to future generations.

Question 26

The phenomenon of 'decision fatigue' describes the deteriorating quality of decisions made after a long session of decision-making. Psychologist Roy Baumeister's research revealed that mental energy, like physical energy, is a finite resource that becomes depleted with use. When people make numerous decisions throughout the day, their ability to make subsequent choices effectively diminishes. This explains why judges are more likely to grant parole early in the day versus late afternoon, and why consumers often make impulsive purchases at the end of shopping trips. The implications extend beyond individual choices to organizational and policy decisions. Understanding decision fatigue has led to strategies for improving decision-making, such as scheduling important choices during peak mental energy periods and reducing the number of trivial decisions through automation or standardization.
The author mentions judges and parole decisions primarily to
A. criticize the judicial system for inconsistent decision-making practices.
B. demonstrate that decision fatigue affects even highly trained professionals.
C. argue that important legal decisions should be automated to ensure fairness.
D. show that decision fatigue only occurs in high-pressure professional environments.

Question 27

The art of traditional Japanese pottery, known as ceramics or yakimono, encompasses various regional styles and techniques that have been refined over centuries. Master potters spend decades perfecting their craft, learning to shape clay with precision and fire pieces at exact temperatures to achieve desired colors and textures. The process requires not only technical skill but also deep understanding of materials, from the specific properties of local clays to the effects of different glazes and firing methods. Many pottery traditions are closely guarded family secrets, passed down through generations of artisans who maintain the authenticity and quality of their regional styles.
Which choice provides the most effective and concise revision of the underlined sentence?
A. The process requires not only technical skill but also deep understanding of materials, from the specific properties of local clays to the effects of different glazes and firing methods.
B. The process requires not only technical skill, but also a deep understanding of materials, from the specific properties of local clays to the effects of different glazes and firing methods.
C. The process requires not only technical skill but also a deep understanding of materials, from the specific properties of local clays to the effects of different glazes and firing methods.
D. The process requires not only technical skill; but also deep understanding of materials, from the specific properties of local clays to the effects of different glazes and firing methods.