Organization, Unity, and Cohesion

Passage

Deep inside a sandstone mountain on the Norwegian island of Spitsbergen lies the Svalbard Global Seed Vault, which houses millions of seed samples to safeguard global biodiversity. The facility is carved into a solid rock hillside, utilizing the surrounding permafrost to maintain a natural freezing environment. . Therefore, the facility still relies on additional electrical cooling units to lower the temperature to the optimal $-18^\circ\text{C}$ required for long-term seed viability.

Which of the following choices best replaces the underlined portion to create a logical and grammatically correct transition between the two sentences?

Consider the passage below about a significant scientific discovery:

[1] In 1938, Marjorie Courtenay-Latimer, a museum curator in South Africa, received a call from a local fisherman who had caught an unusual blue fish. [2] Recognizing its scientific importance, she contacted her colleague, chemistry professor and amateur ichthyologist J.L.B. Smith, to help identify it. [3] Unfortunately, due to the remote location and limited communication options of the era, Smith did not receive her letter for several weeks. [4] By the time he finally arrived to examine the specimen, it had already been taxidermied, making detailed internal analysis impossible. [5] Nevertheless, Smith immediately identified the creature as a coelacanth, a prehistoric fish thought to have gone extinct 66 million years ago.

The writer wants to insert this sentence into the paragraph:

"During this delay, the fish's soft tissues began to decay rapidly in the warm weather."

For the paragraph to remain coherent, where is the best position for this sentence?

For decades, paleontologists believed that the coelacanth—a primitive, deep-sea fish—had gone extinct during the Late Cretaceous period. Therefore, in 1938, a museum curator in South Africa discovered a living specimen among a local fisherman's catch, challenging long-held assumptions about evolutionary history.

Which of the following choices best replaces the underlined portion to establish a logical transition?

Read the passage and answer the question that follows.

[1] In 1952, computer scientist Grace Hopper developed the A-0 System, which is widely considered the first compiler. [2] Before this breakthrough, programmers had to write code in tedious machine language, consisting entirely of binary numbers. [3] Hopper proposed a system that would allow programmers to write instructions in English-like statements, which the compiler would then translate into machine code. [4] Many of her contemporaries, however, doubted this was possible, believing that computers were only capable of understanding arithmetic. [5] Hopper’s favorite hobby, needlepoint, required a similar kind of meticulous, pattern-based thinking. [6] Despite this skepticism, Hopper persisted, and her work eventually laid the foundation for modern programming languages like COBOL.

The writer is considering deleting Sentence 5 from the passage. Should the sentence be kept or deleted?

Passage

Modern airports employ a variety of high-tech methods to prevent bird strikes, which can cause catastrophic engine failure during takeoff. Automated radar systems scan the skies, and sound cannons emit loud blasts to scare away flocks[1] . Consequently, many facility managers have found that these mechanical solutions are less effective over time as birds become habituated to the noise. Instead, airports are increasingly turning to falconry, using trained birds of prey to naturally deter other avian species from nesting near runways.

Which choice provides the most logical and grammatically correct transition between the two sentences?

[1] When chief engineer Washington Roebling became bedridden with decompression sickness during the construction of the Brooklyn Bridge, the project faced a crisis. [2] Fortunately, his wife, Emily Warren Roebling, stepped in to serve as his liaison, translating his instructions for the construction crew. [3] She studied advanced mathematics, materials science, and bridge engineering to prepare herself for this daunting task. [4] Over the next decade, she took over much of the day-to-day supervision of the site, earning the deep respect of both the workers and the trustees. [5] By the time the bridge opened in 1883, she was widely recognized as the driving force behind its completion.

For the sake of logic and cohesion, the writer wants to add the following sentence to the paragraph:

"To perform this role effectively, she had to master complex technical concepts that were typically closed to nineteenth-century women."

To make the paragraph most logical, where should this sentence be placed?

[1] For centuries, scientists have marveled at the durability of ancient Roman concrete, which has survived for two millennia in harsh marine environments. [2] In contrast, modern concrete structures often begin to degrade within a few decades. [3] Recently, researchers discovered that the secret to this longevity lies in 'lime clasts'—small, white mineral chunks found throughout the ancient material. [4] The researchers used high-resolution electron microscopes to analyze the samples in their campus laboratories. [5] Previously dismissed as evidence of poor mixing, these clasts actually provide a self-healing mechanism when water enters cracks in the concrete, reacting to block further damage.

The writer is considering deleting Sentence 4 from the passage. Should this sentence be kept or deleted?

Early typewriters were prone to jamming because the metal typebars would collide if adjacent keys were pressed in rapid succession. To solve this problem, inventor Christopher Sholes rearranged the keyboard layout to separate the most frequently used letter pairs. Nevertheless, typists had to search longer for keys, which slowed their typing speed and prevented the mechanism from sticking.

Which choice best fits the underlined portion?

The following paragraph contains numbered sentences.

[1] In 1886, socialite Josephine Cochrane was frustrated by how often her servants chipped her fine heirlooms while washing them by hand. [2] Cochrane set to work in a shed behind her home, measuring the plates and constructing wire compartments customized to fit them. [3] She then placed these compartments inside a copper boiler that used pressurized hot water to spray the dishes clean. [4] This innovative design proved highly effective, eventually winning the highest award at the 1893 World's Columbian Exposition. [5] Dissatisfied with this manual chore, she first sought out mechanical alternatives, but she found that none existed.

For the sake of the logic and cohesion of the paragraph, where should Sentence 5 be placed?

A writer is editing a draft of an essay about photographic history.

[1] In 1842, astronomer and chemist Sir John Herschel invented the cyanotype, a photographic printing process that produces a Prussian blue monochrome image. [2] Herschel was primarily looking for a reliable way to copy his extensive mathematical and astronomical notes without having to rewrite them by hand. [3] The process involves coating paper with a solution of ammonium iron(III) citrate and potassium ferricyanide, which is then dried in the dark. [4] When exposed to ultraviolet light, the chemicals react to form an insoluble blue dye, while the unexposed areas remain white after being washed with water. [5] Herschel's invention eventually became highly popular among architects and engineers in the twentieth century for reproducing technical drawings, which is how the term 'blueprint' originated.

The writer is considering deleting Sentence 2 from the passage. Should the writer make this deletion?

Passage

For centuries, the Khasi people of Meghalaya, India, have guided the aerial roots of *Ficus elastica* trees across rushing rivers, slowly weaving them into living bridges. Unlike standard wooden or steel structures, these organic bridges grow stronger over time and can easily withstand the region's extreme monsoon floods. [1] Consequently, the process of growing a living bridge requires immense patience, often taking up to $15$ years before the structure can support any pedestrian weight.

Question

Which choice provides the most logical transition from the preceding sentence to the sentence that follows?

A writer is editing a draft of an essay about the history of timekeeping in the United States.

[1] In the mid-nineteenth century, the expansion of the American railroad network created an urgent need for standardized timekeeping. [2] Before this, towns set their clocks according to the sun's position at local noon, resulting in thousands of localized time zones across the country. [3] A passenger traveling from Boston to Washington, D.C., for example, had to adjust their watch dozens of times during the journey. [4] Standardized time zones were officially adopted in 1883, dividing the country into four distinct zones. [5] Railroad companies were privately owned and highly competitive during this era.

Which of the following represents the most logical decision regarding the proposed deletion of Sentence 5?

The writer wants to add the following sentence to the paragraph:

'These disparate sheets were often stored loosely in scrolls or portfolios, which made them prone to damage and difficult to consult.'

[1] In 1570, Flemish cartographer Abraham Ortelius published the *Theatrum Orbis Terrarum*, which is widely considered the first modern atlas. [2] Prior to this publication, maps were printed in various sizes and formats, making them difficult to bind or compare. [3] Ortelius resolved this issue by compiling existing maps, engraving them onto uniform copper plates, and printing them as a cohesive book. [4] This standardized format revolutionized cartography, allowing merchants and scholars to view the entire known world in a single, organized volume.

To make the paragraph most logical, where should this sentence be placed?

[1] During a chilly trolley ride in New York City in 1902, Mary Anderson noticed that the motorman had to open the front window to wipe away the accumulating sleet. [2] This forced the driver to endure the freezing wind and rain just to maintain a clear view of the street ahead. [3] Upon returning home to Alabama, she sketched a design for a rubber blade that could be operated from inside the vehicle by turning a hand lever. [4] Many manufacturing firms initially refused to purchase the rights to the design, dismissing it as a dangerous distraction to drivers. [5] This manual wiper, which she patented the following year, successfully kept the window clean without requiring the driver to open the glass.

To make this paragraph most logical and cohesive, where should Sentence 5 be placed?

Although lacking a brain or central nervous system, the slime mold *Physarum polycephalum* exhibits remarkable problem-solving capabilities. During laboratory experiments, the single-celled organism can navigate complex mazes to locate food. To achieve this, the slime mold leaves a trail of extracellular slime as it moves, creating a physical record of where it has been. Conversely, this externalized spatial memory prevents the organism from wasting energy re-exploring dead ends.

Which choice best transitions from the preceding sentence to the sentence that follows by establishing a logical cause-and-effect relationship?

The following passage is about the history of Tyrian purple.

The Golden Dye of Tyre

In the ancient Mediterranean world, color was a potent symbol of status, power, and wealth. No hue carried more prestige than Tyrian purple, a rich, deep violet dye that became synonymous with royalty and imperial authority. The source of this coveted pigment was the humble murex snail, a carnivorous marine mollusk abundant along the rocky coasts of Phoenicia. Extracting the dye, however, was a labor-intensive and notoriously foul-smelling process. Workers gathered the mollusks by lowering traps baited with cockles into the shallow waters. The tiny glands of the snails were then meticulously removed and salted before the heating process began; thousands of snails had to be harvested from the sea and boiled in large lead vats for days to yield just a single gram of the precious secretion.

[Paragraph Break]

[2] While common vegetable-based dyes quickly faded under the Mediterranean sun or washed out during routine laundering, Tyrian purple grew richer and more intense with exposure to sunlight and wear. Consequently, the Phoenician city of Tyre grew incredibly wealthy from this specialized trade, establishing monopoly networks that stretched across the sea. Roman emperors eventually restricted the dye's use by sumptuary laws, decreeing that only the imperial family could wear garments colored with the premium pigment. This legal exclusivity cemented the color's status as the ultimate marker of political authority for centuries.

Which choice provides the most effective transition from the preceding paragraph and introduces the main topic of the second paragraph?

[1] In 1965, chemist Stephanie Kwolek was analyzing a liquid crystal polymer solution to find a lightweight fiber for tires. [2] The resulting mixture was unusually runny and cloudy, prompting other researchers to suggest discarding it. [3] Kwolek, however, believed that the solution had potential and insisted on testing the fluid in a spinneret machine. [4] The machine spun the liquid into a remarkably durable fiber. [5] Today, this material, known as Kevlar, is widely used in bulletproof vests and aerospace engineering.

The writer wants to add the following sentence to the paragraph:

"To her surprise, the spun fiber proved to be five times stronger than steel."

Where should this sentence be placed to make the paragraph most logical?

Passage

Polynesian wayfinders navigated thousands of miles of open ocean without any modern instruments, relying instead on natural cues like stars, ocean swells, and bird migration patterns to guide their canoes. [1] Consequently, a sudden overcast sky or an unexpected shift in wind could disorient even a skilled navigator, stalling the journey for days.

Which choice best replaces the underlined word [1] to establish a logical transition between the two sentences?

The following sentences are from a paragraph about the use of falconry at airports. Arrange the sentences in the most logical order to create a cohesive paragraph that begins with a clear introduction of the problem and ends with a strong concluding thought.

Passage

The *Welwitschia* plant survives in the hyper-arid Namib Desert by absorbing moisture from early morning fog. Nonetheless, it has developed an extensive, shallow root system to capture any sporadic rainfall that touches the desert floor.

Which choice best replaces the underlined word to establish the most logical relationship between the two sentences?