Organization, Unity, and Cohesion

The following paragraphs are from an essay about the history of standard time zones. Arrange the paragraphs in the most logical order to create a cohesive passage.

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?

Peatlands, which cover only three percent of the Earth's land surface, are highly efficient carbon sinks, storing twice as much carbon as all the world's forests combined. However, when these wetlands are drained for agriculture, they transform into massive sources of greenhouse gases. Recognizing this threat, conservationists are working to restore these areas to their natural waterlogged states. This process, known as rewetting, blocks oxygen from reaching the dead plant matter, halting decomposition and locking carbon in the soil. [X]

The writer wants to add a sentence at the end of the paragraph (indicated by [X]) that emphasizes the long-term, global climate impact of peatland restoration. Given that all the choices are true, which choice most effectively fulfills this goal?

[1] For decades, art restorers in Pompeii struggled to clean the delicate frescoes blackened by centuries of soot, volcanic ash, and accumulated wax. [2] Traditional chemical solvents often dissolved the ancient pigments beneath the grime, causing irreversible damage to the vibrant red and yellow depictions of mythological scenes. [3] In recent years, however, conservators have turned to laser cleaning technology, which uses short pulses of light to vaporize the dark encrustations without heating or altering the underlying paint. [4] This precise method allows the frescoes to be restored to their original brilliance, revealing details that had been obscured since the eruption of Mount Vesuvius in 79 CE. [5] Lasers have also become increasingly popular in dermatological clinics for removing unwanted tattoos and scars.

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

The paragraphs below are from a draft of an essay about the discovery of hydrothermal vents. Arrange these paragraphs in the most logical order to create a cohesive and well-structured essay.

[1]
Plants have long been viewed as solitary organisms competing for resources like sunlight and water. However, research over the past few decades has revealed a complex underground network that connects trees and other plants. Through mycorrhizal networks—intricate webs of fungal threads—trees can share nutrients, water, and even chemical warnings.

[2]
This subterranean connection does more than just transport passive nutrients; it also functions as an active communication line. For instance, when a tree is attacked by pests, it can send chemical signals through the fungal network to warn its neighbors. Upon receiving the signal, the neighboring trees immediately begin producing defensive chemicals, such as tannins, to deter the oncoming insects.

Which choice most effectively transitions from the preceding paragraph to the paragraph that follows?

Passage:

Cellulose nitrate film, the standard medium for early motion pictures, is highly flammable and degrades rapidly over [1] <underline>time. Consequently, archivists</underline> house these fragile reels in specialized, temperature-controlled vaults. By maintaining low temperatures and stable humidity, they prevent the film from decomposing into an acidic powder or catching fire.

Question:

Which choice best establishes a logical and grammatically correct transition between the two sentences?

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.

[1]
In 1930, Ruth Wakefield and her husband purchased a historic lodge in Whitman, Massachusetts, and opened the Toll House Inn. Ruth, a skilled dietitian and chef, quickly gained a reputation for her exceptional desserts, particularly her thin, crisp butter drop cookies. The inn soon became a popular destination for travelers seeking a comforting meal and sweet treats.

[2]
One afternoon in 1938, while preparing a batch of her famous cookies, Wakefield realized she had run out of baker's chocolate. Hoping to save time, she chopped up a bar of Nestlé semi-sweet chocolate and added the small chunks directly to the cookie dough. She fully expected the chocolate pieces to melt and marbleize the cookies during baking.

[3]
Word of Wakefield’s delicious new recipe spread rapidly, causing sales of Nestlé's semi-sweet chocolate bars to skyrocket. This sudden surge in demand prompted the company to strike a deal with Wakefield: they would print her Toll House recipe on their packaging in exchange for providing her with a lifetime supply of chocolate.

[4]
Instead of melting completely into the dough, however, the chocolate bits retained their shape, softening into creamy pockets of rich flavor. The resulting creation—which she called the "Toll House Chocolate Crunch Cookie"—was an instant sensation among the inn's guests.

For the sake of the logic and cohesion of this essay, where should Paragraph 4 be placed?

The following paragraphs are from an essay about the invention and history of the saxophone. To make the essay flow most logically, in what order should the paragraphs be arranged?

Passage:
For decades, Mesoamerican scholars assumed that cacao was strictly a luxury item reserved for the Maya elite, who drank it from elaborate vessels during ceremonial rituals. [1] <underline>Consequently,</underline> chemical analyses of pottery fragments from modest, ordinary households have revealed traces of theobromine, a compound unique to cacao. This finding suggests that chocolate consumption was far more widespread across social classes than previously believed.

Which choice most effectively establishes the logical relationship between the traditional scholarly assumption and the new scientific evidence?

The writer wants to organize the sentences below to logically present the chronological steps of Jocelyn Bell Burnell's discovery of the first pulsar. Arrange the sentences in the most logical order to achieve this goal.

The following paragraph is from an essay about maritime archaeology.

[1] For centuries, the ancient Egyptian port city of Thonis-Heracleion was shrouded in myth, buried under the silt of the Mediterranean Sea. [2] Consequently, many scholars doubted whether the legendary trade hub had ever actually existed. [3] In 2000, French archaeologist Franck Goddio made a breakthrough discovery when he located the submerged ruins. [4] Subsequent excavations at the underwater site revealed colossal statues, gold coins, and massive temple structures. [5] These artifacts, remarkably preserved by the marine sediment, provided unprecedented insights into ancient maritime commerce.

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

'Until this discovery, historians had only known of the port through sparse mentions in classical Greek texts.'

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

[1] In the early twentieth century, the Chicago school of architecture revolutionized urban design by pioneering the use of steel-frame construction. [2] Before this innovation, buildings relied on thick, load-bearing masonry walls, which severely limited their height. [3] By replacing heavy stone with a lightweight steel grid, architects could build much taller structures while maximizing interior space and window area. [4] Chicago's population grew rapidly during this era, driving demand for dense commercial real estate. [5] Consequently, this engineering breakthrough laid the foundation for the modern skyscraper and transformed city skylines across the globe.

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

In 1965, chemist Stephanie Kwolek was analyzing a liquid crystalline polymer solution when she noticed it had a low viscosity and a cloudy, watery appearance. Most researchers would have discarded such a mixture as a failed experiment. [1] Consequently, Kwolek insisted on spinning the solution in a laboratory spinneret to test its properties. The resulting fibers possessed an unprecedented strength-to-weight ratio, eventually leading to the development of Kevlar.

Which choice best replaces the underlined portion [1] to create a logical transition between the sentences?

The following paragraph is from an essay about the preservation of historical architecture.

[1] Carved directly into the red volcanic tuff of northern Ethiopia, the eleven monolithic churches of Lalibela stand as masterpieces of medieval architecture. [2] Because these subterranean structures are dug entirely below ground level, they are uniquely vulnerable to water damage from seasonal rains. [3] For centuries, local priests and caretakers have struggled to siphon out the pooling rainwater that collects in the deep trenches surrounding the sanctuaries. [4] Recognizing this threat, international conservation teams recently constructed large, modern shelters over several of the churches to block incoming rain. [5] Unfortunately, these massive metal structures have generated controversy among locals who argue that the modern canopies disrupt the spiritual atmosphere of the sacred site.

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

"This persistent dampness, however, does not merely inconvenience the clergy; it actively dissolves the delicate volcanic stone from which the carvings are fashioned."

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

When Mount Vesuvius erupted in 79 CE, it buried the Roman town of Herculaneum under a thick layer of volcanic ash. Villa excavations in the mid-eighteenth century revealed a library filled with hundreds of carbonized papyrus scrolls. For centuries, attempts to unroll these fragile documents resulted in their disintegration. Recently, however, researchers have utilized non-invasive imaging techniques to read the scrolls without physically touching them.

Using high-energy X-ray phase-contrast tomography, scientists can map the minute differences in thickness and texture of the carbonized ink compared to the carbonized paper. ____________ By translating these digital scans into three-dimensional models, researchers are beginning to read words that have been locked away for nearly two millennia.

The writer wants to add a sentence at the underlined portion to highlight the physical similarity between the ink and the scrolls, illustrating why traditional imaging methods fail. Which choice most effectively accomplishes this goal?

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?

[1] In 1959, Soviet geneticist Dmitry Belyaev began a decades-long experiment to understand how wild animals become domesticated. [2] He hypothesized that selecting animals solely for their tameness would trigger a cascade of physical and behavioral changes over generations. [3] To test this, Belyaev bred silver foxes, selecting only those that showed the least fear and aggression toward humans. [4] Over several generations, the foxes not only became friendly like domestic dogs but also developed floppy ears, spotted coats, and wagging tails. [5] Silver foxes are a color variant of the red fox, *Vulpes vulpes*.

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

Passage:
For decades, computer scientists believed that solving complex spatial optimization problems required sophisticated digital algorithms. [1] <underline>As a result</underline>, researchers recently demonstrated that the brainless slime mold *Physarum polycephalum* can design efficient network paths that rival human-engineered transit systems.

Question:
Which of the following choices most effectively transitions from the preceding sentence to the sentence that follows?