Opening and Concluding Sentences

The following sentences are from a paragraph about the history of green fluorescent protein (GFP). Arrange these sentences in the most logical sequence to form a cohesive, unified paragraph, ensuring that the introduction and conclusion are placed effectively.

Deciphering the Bronze Age

[1]
For decades, the clay tablets unearthed at the ancient palace of Knossos by archaeologist Arthur Evans remained an impenetrable mystery. Written in a script dubbed "Linear B," these inscriptions defied translation, leaving scholars to debate whether the language was Basque, Etruscan, or an early form of Greek. Evans himself fiercely maintained that Linear B could not possibly be Greek, believing it belonged to a distinct Minoan civilization that dominated the Aegean long before the rise of Mycenae. This authoritative stance discouraged many researchers from pursuing Greek linguistic leads, thereby stalling progress for nearly half a century.

[2]
The breakthrough finally came in the early 1950s through the collaborative, yet independent, efforts of Alice Kober and Michael Ventris. Kober, a classicist at Brooklyn College, meticulously recorded grammatical patterns on thousands of index cards, proving that the language was inflected—meaning that word endings changed to indicate grammatical relationships. Following her untimely death, Ventris, an architect with a passion for codes, built upon her work. By constructing a grid that mapped consonant and vowel relationships, Ventris unlocked the phonetic values of the symbols and realized, to his own surprise, that the tablets were indeed written in an archaic Greek dialect.

[3]
[ 1 ] The tablets did not contain epic poetry or grand historical narratives, as some had hoped, but were instead mundane administrative records: lists of sheep, jars of olive oil, and distributions of bronze to local smiths. Yet, in their very domesticity, these documents provided invaluable insights into the highly centralized palace economy and social hierarchy of late Bronze Age Greece.

Which of the following sentences, if added at the bracketed marker [ 1 ] in the third paragraph, would provide the most logical transition from the second paragraph and introduce the main topic of the third paragraph?

The sentences below are from a paragraph about the development of the bicycle. How should these sentences be ordered to form a coherent paragraph that begins with a clear topic sentence and ends with an effective concluding sentence?

A student is writing an essay about the 1977 discovery of deep-sea hydrothermal vents. Read the five sentences below and arrange them in the most logical order to create a cohesive paragraph that establishes a clear introduction and transitions smoothly to a strong conclusion.

The following is a passage about a prehistoric fish.

The Living Fossil

[1]
In 1938, Marjorie Courtenay-Latimer, a museum curator in South Africa, received a phone call from a local trawler captain who had cleared his nets of an unusual catch. Among the pile of common sharks and rays lay a five-foot-long, steel-blue fish with thick, limb-like fins and a strange, armored head. Courtenay-Latimer, unable to identify the strange creature, brought it to the museum and eventually wrote to her colleague, J.L.B. Smith, a prominent chemist and amateur ichthyologist. Upon examining the specimen, Smith was astounded; it was a coelacanth, a prehistoric fish believed to have gone extinct 66 million years ago. This remarkable discovery shook the scientific world, challenging the prevailing geological timeline and redefining our understanding of vertebrate evolution.

[2]
[___]. Smith spent the next fourteen years searching for a second specimen to prove that the South African catch was not a freak anomaly. He printed thousands of flyers offering a reward for another specimen, distributing them along the eastern coast of Africa. In 1952, a second coelacanth was finally caught off the coast of the Comoros Islands, confirming that a living population did indeed exist in the Indian Ocean. Over the subsequent decades, marine biologists have discovered that these 'living fossils' reside in deep-water caves, move with an unusual locomotive pattern, and have changed very little over millions of years. Today, the coelacanth remains a symbol of biological endurance and mystery.

Which of the following sentences, if placed in the blank in Paragraph 2, would provide the most logical transition from the first paragraph and introduce the main topic of the second paragraph?

The following sentences are from a paragraph about how pencils are manufactured. Arrange the sentences in the most logical order to form a coherent paragraph that begins with the main introduction and ends with a clear conclusion.

Saving the Sounds of the Past

[1]
For over a century, the earliest recordings of human speech and musical performances remained trapped on fragile, rapidly decaying media. Early audio cylinders made of soft wax, discs composed of brittle shellac, and delicate tinfoil sheets held the voices of historical figures, poets, and musicians. However, actually playing these historic recordings meant risking their permanent destruction. The physical contact of a playback stylus, or needle, would inevitably scrape away the microscopic grooves etched into the surface, eroding the precious sound waves with every single listen. For decades, archivists faced a frustrating paradox: to hear the past, they had to destroy it.

[2]
To solve this problem, physicist Carl Haber developed a revolutionary non-contact method using high-resolution digital imaging. By scanning the surfaces of these delicate media, Haber’s system—known as IRENE—creates a detailed, ultra-high-resolution three-dimensional map of the grooves. Software then analyzes this visual map and reconstructs the audio, bypassing the need for any physical contact with the fragile object. _________

[3]
Through this technology, researchers have successfully restored recordings once deemed completely unplayable. For example, a tinfoil recording of inventor Alexander Graham Bell's voice from 1885, previously far too damaged to touch, was played back clearly for the first time in over a century. The voices of the past are no longer silent, thanks to this innovative intersection of particle physics, digital imaging, and historical sound preservation.

The writer wants to add a sentence at the end of Paragraph 2 (after the sentence ending in 'fragile object') to conclude the paragraph and transition to the next paragraph. Which of the following sentences best accomplishes this goal?

The following is a passage about the history of the telescope.

[1]
In the early seventeenth century, a spectacle maker named Hans Lippershey filed a patent for a device that could make distant objects appear close. This simple device, consisting of two lenses in a tube, marked the birth of the telescope. Recognizing its potential, the Italian astronomer Galileo Galilei quickly constructed his own version, pointing it toward the night sky. With his telescope, Galileo discovered the four largest moons of Jupiter and observed the phases of Venus, forever altering our understanding of the universe.

[2]
As the centuries progressed, astronomers built increasingly large and complex telescopes. Sir Isaac Newton revolutionized the design by using mirrors instead of glass lenses to focus light, which solved the problem of color distortion. This reflecting telescope layout paved the way for massive modern observatories situated on remote mountaintops, far from the light pollution of cities.

[3]
Today, telescopes are no longer confined to the Earth's surface. In 1990, the Hubble Space Telescope was launched into orbit above the atmosphere, providing humanity with stunningly clear images of distant galaxies. As technology advances, newer instruments like the James Webb Space Telescope continue to push the boundaries of what we can see. ________

Which choice provides the most effective and logical conclusion to the passage?

The following sentences are from a paragraph about the preservation of ancient scrolls. Arrange the sentences in the most logical order to form a coherent paragraph that begins with a clear introduction and ends with an effective concluding sentence.

A student is writing a paragraph about the invention of the chocolate chip cookie. Arrange the following sentences in the most logical order to create a coherent paragraph that begins with a clear introduction and ends with an effective conclusion.

Designing on the Wing

In the late 1980s, Japan’s high-speed Shinkansen trains faced a major engineering obstacle that threatened their continued expansion: noise pollution. As the trains traveled through narrow mountain tunnels at speeds exceeding 150 miles per hour, they compressed the air ahead of them, creating a high-pressure wave. Upon exiting the tunnel, this compressed air expanded rapidly, producing a deafening sound known as a "tunnel boom" that could be heard over a mile away. The source of the problem was the train’s bullet-shaped nose, which pushed a wall of air forward rather than slicing through it cleanly.

Eiji Nakatsu, the train’s chief engineer and an avid birdwatcher, looked to the natural world for a solution to this mechanical dilemma. He focused on the kingfisher, a predatory bird that dives from the air into water to catch fish. Nakatsu reasoned that if a bird could transition smoothly between two mediums of drastically different densities with barely a splash, a train could do the same when transitioning from the open air into a compressed tunnel. Water and air, though differing in density, behave similarly under fluid dynamic principles.

By redesigning the train's nose to mimic the long, wedge-shaped beak of the kingfisher, Nakatsu’s team succeeded in eliminating the tunnel boom entirely. ________

Which choice provides the most logical and effective conclusion to the passage by highlighting the multiple positive outcomes of the train's new design?

Urban Apiaries

[1]
In cities around the world, a new kind of agricultural movement is buzzing on rooftops and balconies. Honeybees are finding comfortable homes on the roofs of high-rise apartment buildings, office towers, and community centers. This practice, known as urban beekeeping, has surged in popularity over the last decade as city residents look for creative ways to support local ecosystems and produce their own food.

[2]
Many people assume that cities are concrete deserts unfriendly to wildlife, but research shows that urban areas can be highly beneficial to pollinators. Rooftop gardens, backyard plots, and city parks provide a surprisingly diverse diet for bees. Unlike large industrial agricultural fields, which often grow only a single crop for miles, cities offer a wide variety of flowers, trees, and ornamental plants that bloom at different times of the year. This botanical diversity helps keep honeybee colonies healthy and resilient against disease.

[3]
[1] For instance, many city dwellers now have access to hyper-local honey, which is sold at neighborhood farmers' markets. Additionally, rooftop hives serve as unique educational tools, teaching school children and community members about the vital role pollinators play in our food systems. Ultimately, these urban apiaries help citizens feel more connected to the natural world.

Which of the following sentences, if added at Point [1] in Paragraph 3, would provide the most effective introduction to the paragraph?

The following sentences are from a paragraph about Polynesian navigation techniques. Arrange the sentences in the most logical order to create a cohesive paragraph that begins with the most effective introduction and ends with the most effective concluding sentence.

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?

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.

Signals Across the Hills

[1]
In the late eighteenth century, communication over long distances was limited by the speed of a galloping horse. During the French Revolution, however, Claude Chappe and his brothers developed the semaphore telegraph, a revolutionary system of visual signaling. The system consisted of a series of towers built on high hills, each equipped with a large wooden apparatus containing two movable arms. Operators adjusted these arms using ropes and pulleys to represent different letters and symbols. These configurations could be seen from the next tower through a telescope, allowing messages to be passed rapidly from one station to the next.

[2]
The impact of this invention was immediate and profound. A message could travel from Paris to Lille—a distance of over one hundred and forty miles—in just ten minutes, a feat that previously took an entire day. By the early nineteenth century, France was crisscrossed by hundreds of semaphore towers, which provided the government with a crucial administrative and military tool. Yet, the system had significant limitations. It was useless at night or in heavy fog, and it required a massive, expensive workforce of operators who had to remain constantly vigilant.

[3]
Despite these drawbacks, the Chappe semaphore telegraph remained the gold standard of long-distance communication for decades. It was only rendered obsolete in the mid-nineteenth century with the advent of the electrical telegraph, which could transmit information instantly regardless of weather or time of day. _______________________

The writer wants to add a concluding sentence at the end of the passage (following the blank in Paragraph 3) that reinforces the historical significance of the semaphore telegraph as a precursor to modern telecommunications. Which of the following sentences best achieves this goal?

The following sentences are from a paragraph about the invention of the windshield wiper. Arrange the sentences in the most logical order to create a cohesive paragraph that begins with the most effective introduction and ends with the most effective conclusion.

Echoes of the Past

Archaeoacoustics is a relatively new interdisciplinary field that combines archaeology, ethnomusicology, and acoustic engineering to analyze the soundscapes of ancient sites. Researchers in this field believe that to truly understand ancient civilizations, we must consider not only what they saw, but also what they heard. By studying how sound behaves in prehistoric structures, scholars hope to gain insight into the ritualistic, social, and spiritual lives of ancient people.

At Stonehenge, for example, researchers used 3D laser scanning and acoustic modeling to reconstruct the monument's original layout, including the stones that are now missing or fallen. They discovered that the megaliths acted as a giant chamber, amplifying speech and reverberating musical instruments while blocking out external noise from the surrounding plains. To anyone standing inside the stone circle, the acoustic reflections would have created a sense of isolation and focus, enhancing the dramatic effect of rituals.

Indeed, the acoustic properties of prehistoric structures were rarely accidental. From the subterranean chambers of Malta to the Mayan pyramids of Chichen Itza, ancient builders deliberately shaped their environments to control sound. The acoustic design of Chichen Itza's El Castillo pyramid, for instance, produces a chirping echo resembling the sacred quetzal bird when visitors clap at the base of the stairs.

Given that all the choices are true, which choice most effectively concludes the paragraph and the passage by reinforcing the central idea that ancient acoustic design was intentional and suggesting its ongoing impact on modern scholarship?

The following sentences are from a paragraph about nurse logs in temperate rainforests. In what order should these sentences be arranged to create the most logical and cohesive paragraph?

Oasis in the Abyss

[1]
In 1977, oceanographers aboard the research vessel *Alvin* descended more than a mile into the pitch-black depths of the Galapagos Rift. They expected to find a barren, lifeless oceanic desert, devoid of any significant biological activity. Instead, they made a discovery that revolutionized the scientific understanding of life on Earth: thriving ecosystems surrounding hydrothermal vents. These vents, which are volcanic fissures in the ocean floor, spewed superheated, mineral-rich water from deep within the Earth's crust into the freezing ocean. Surprisingly, massive red-tipped tube worms, ghost-white crabs, and dense clusters of clams flourished in this extreme environment, completely cut off from sunlight.

[2]
Prior to this groundbreaking expedition, scientists believed that all life ultimately depended on photosynthesis, the process by which plants convert sunlight into energy. In the deep sea, however, microbes called extremophiles utilize chemosynthesis instead. Rather than relying on solar energy, these specialized bacteria oxidize toxic hydrogen sulfide gas emerging from the vents to produce organic matter. By doing so, they form the foundation of a unique food web that sustains the larger organisms in the community. This process proved that complex ecosystems could thrive without a single ray of solar energy.

[3]
Consequently, astrobiologists have begun looking at hydrothermal vents as models for potential life on other celestial bodies. If life can flourish in the dark, high-pressure oceans of the Galapagos Rift, similar environments might exist under the icy crusts of Jupiter’s moon Europa or Saturn’s moon Enceladus, where subsurface oceans are believed to exist. ________

The writer is considering how to conclude the passage. Which choice provides the most logical and effective concluding sentence for the passage as a whole?