Organization, Unity, and Cohesion

302 questions

Question 281Question

Passage

Unlike standard Western paper, which is often made from acidic wood pulp that degrades over time, Japanese *washi* paper is crafted from the long, strong inner bark fibers of native plants like kozo and gampi. Consequently, this paper is exceptionally durable and resistant to tearing, making it an ideal tool for book conservationists.

Which choice provides the most logical transition from the preceding sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

NO CHANGE (which keeps 'Consequently,')
The transition 'Consequently' is correct because it logically connects the cause (the long, strong bark fibers) to the effect (the paper's exceptional durability and resistance to tearing).

Step-by-Step Solution

1
Analyze the relationship between the two sentences.
The first sentence explains that Japanese washi paper is made from long, strong plant fibers. The second sentence states that this paper is exceptionally durable and resistant to tearing.
Understanding the logical connection between the ideas is essential to choosing the correct transition.
2
Determine the type of relationship.
The strength and length of the fibers (cause) directly result in the paper's durability (effect). Thus, a cause-and-effect transition is required.
The transition must accurately reflect this relationship.
3
Evaluate the choices against the identified relationship.
'Consequently' is a cause-and-effect transition, making it the most logical fit. 'Nevertheless' (contrast), 'Similarly' (comparison), and 'For instance' (illustration) do not fit.
This confirms the correct transition word.

Key Concept

Selecting the transition word that establishes the correct logical relationship (cause-effect, contrast, addition, or illustration) between sentences.
Question 282Question

The Marble and the Mallet

[1]
In the mid-nineteenth century, a sculptor named Edmonia Lewis defied societal expectations to achieve international acclaim. Born to a Native American mother and an Afro-Haitian father, Lewis was orphaned at a young age. Despite facing intense prejudice, she eventually traveled to Rome, Italy, where she joined a vibrant community of expatriate artists and sculpted in neoclassical marble. Her work drew inspiration from both her heritage and contemporary social movements, such as the abolition of slavery.

[2]
Lewis’s Rome studio became a popular stop for wealthy travelers on the Grand Tour, who marveled at her ability to breathe life into cold stone. Unlike many of her contemporaries, who hired local Italian artisans to carve their plaster models into marble, Lewis did all her carving herself. She feared that if she did not perform the labor, critics would attribute her achievements to male assistants. Consequently, her dedication to her craft resulted in striking works like *The Death of Cleopatra*, a massive, realistic sculpture that captivated audiences at the 1876 Centennial Exposition in Philadelphia.

[3]
For decades after her death in 1907, much of Lewis's work was lost or forgotten, and *The Death of Cleopatra* was even found in a Chicago salvage yard before being restored. Today, museums around the world display her sculptures, celebrating her pioneering role as a woman of color in the fine arts. She is remembered not just as a skilled artisan but as an artist who carved her own path through history. __________

The writer wants to conclude the passage by emphasizing Lewis's lasting legacy and the theme of overcoming adversity. Which choice best accomplishes this goal?

Show answer & explanation

Answer: Through her resilience and artistic brilliance, Lewis ensured that her voice would be heard across generations.

Answer

The option stating that Lewis's resilience and artistic brilliance ensured her voice would be heard across generations is the correct answer.
The option stating that Lewis's resilience and artistic brilliance ensured her voice would be heard across generations is correct because it directly addresses the writer's dual goals. 'Resilience' highlights the theme of overcoming adversity, while 'her voice would be heard across generations' emphasizes her lasting legacy. It does so in a grammatically correct format and maintains the formal biographical tone of the passage.

Step-by-Step Solution

1
Identify the writer's goals
The final sentence must emphasize Lewis's lasting legacy and the theme of overcoming adversity.
This establishes the rhetorical criteria specified in the question stem.
2
Evaluate the choices for grammatical correctness
The choice beginning with 'Although her path' contains a punctuation error (semicolon separating a dependent clause).
Eliminating grammatically incorrect options narrows down the choices.
3
Evaluate the content and tone of the remaining choices
The choice beginning with 'She eventually passed away' introduces new details instead of concluding, and the choice beginning with 'She was a totally awesome' uses an inappropriately informal tone.
This rules out choices that violate cohesion and register standards.
4
Select the choice that best fulfills all criteria
The choice starting with 'Through her resilience' is correct, formal, and covers both requested themes.
It successfully completes the passage with a strong, thematic conclusion.

Key Concept

Opening and Concluding Sentences
Question 283Question

In 1964, radio astronomers Arno Penzias and Robert Wilson were troubled by a persistent background hiss in their satellite antenna. They went to great lengths to eliminate potential sources of interference, even cleaning the horn antenna of nesting pigeons; consequently, the mysterious static remained. Eventually, this noise was identified as the cosmic microwave background radiation, a discovery that provided crucial evidence for the Big Bang theory.

Which of the following choices best completes the underlined portion of the passage?

Show answer & explanation

Answer: ; still,

Answer

The correct choice is the one using a semicolon followed by 'still,' because it correctly punctuates the two independent clauses and establishes a contrast relationship.
The transition must establish a contrast relationship because the static remained despite the cleaning efforts. Additionally, because the transition connects two independent clauses, a semicolon is required before the transition to avoid a comma splice. The option with a semicolon followed by 'still,' fulfills both requirements.

Step-by-Step Solution

1
Analyze the relationship between the two clauses.
The first clause describes actions taken to eliminate static, while the second clause states that the static remained. This relationship is contrastive, meaning a transition showing contrast is needed.
Identifying the logical relationship is necessary to select the correct transition word.
2
Examine the grammatical structure and punctuation connecting the clauses.
Both clauses are independent. Joining them with a comma and a transition word creates a comma splice. A semicolon is required to properly separate them.
Determining grammatical constraints ensures the sentence structure is correct.
3
Select the option that matches both the logical and grammatical requirements.
The option with a semicolon followed by 'still,' meets both requirements.
This step identifies the single correct option.

Key Concept

Sentence-Level Transitions
Question 284Question

The following sentences are from a paragraph about restoring historical sound recordings. 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.

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Answer

The logical order of the paragraph begins with the introduction of the archivist's dilemma with fragile media, followed by the introduction of the optical scanning solution, then the explanation of how the computer reconstructs the sound, and finally the concluding statement about the overall impact of this non-invasive technology.
The correct order begins by establishing the central historical challenge (the fragility of wax cylinders and other recordings), introduces the digital camera solution (the IRENE system), details how the software converts the digital images back into sound waves, and concludes with a summary of the technology's overall impact on historical preservation.

Step-by-Step Solution

1
Identify the most effective opening sentence.
The sentence about archivists struggling to play damaged historical recordings because of physical needles is the only one that introduces a general topic and sets up a problem without relying on prior context.
An effective introduction must establish the subject matter and provide the context necessary for the rest of the paragraph to make sense.
2
Determine the logical flow of the body sentences.
The sentence about the IRENE system must follow because it begins with 'To solve this problem,' referring directly to the needles destroying the soft media. The sentence about the computer program analyzing the images must come next, as it explains the subsequent step of how the scans are converted back into sound waves.
Cohesive paragraphs maintain a clear, step-by-step logical progression where each sentence builds directly on the information presented in the preceding one.
3
Identify the most effective concluding sentence.
The sentence beginning with 'Consequently' summarizes the ultimate success and significance of this technology, closing the loop on the initial problem of preserving fragile recordings without damaging them.
An effective conclusion uses transitional elements to signal the end of the discussion and summarizes the main point or impact of the paragraph.

Key Concept

Identifying the logical flow of a paragraph by determining which sentence serves as the best introduction to establish the topic and which sentence serves as the best conclusion to summarize the main point.
Estimated Time:1m 30s
Question 285Question

In 1948, graduate student Bernard Silver overheard a supermarket executive asking a university dean to develop a system that could automatically capture product information at checkout. Silver mentioned this challenge to his friend Norman Joseph Woodland, who became obsessed with finding a solution. Woodland initially tried using ultraviolet ink, but the ink faded too quickly and was expensive. Indeed, he focused his efforts on creating a physical pattern of lines inspired by Morse code.

Which choice provides the most logical transition from the preceding sentence?

Show answer & explanation

Answer: expensive. Instead, he

Answer

expensive. Instead, he
The correct option is the one that reads 'expensive. Instead, he'. This choice properly identifies the transition as an alternative action after the ultraviolet ink experiment failed, and it uses a period to avoid a comma splice between two independent clauses.

Step-by-Step Solution

1
Analyze the logical relationship between the sentence about the failed ultraviolet ink and the sentence about the Morse code pattern.
The second sentence describes an alternative path Woodland took after the first method failed, indicating a relationship of contrast or replacement.
Identifying the logical connection is necessary to choose the correct transition word.
2
Evaluate the transition words in the choices based on this relationship.
The word 'Instead' correctly represents a replacement or alternative action. 'Indeed' shows confirmation, and 'Likewise' shows similarity, neither of which fit the context.
Filtering out transitions that establish the wrong logical relationship narrows down the choices.
3
Check the punctuation joining the two independent clauses.
The clauses before and after the transition are both independent. A period is required to separate them. Using a comma with the conjunctive adverb 'instead' creates a comma splice.
Proper punctuation must be used to avoid structural sentence errors.

Key Concept

Identifying the logical relationship between consecutive sentences and punctuating conjunctive adverbs correctly to avoid comma splices.
Question 286Question

The following sentences are from a paragraph about the engineering feat of reversing the Chicago River. 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 an effective concluding sentence that summarizes the project's impact.

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Answer

The logical order begins with the introduction of the public health crisis, followed by the decision to reverse the river, then the details of how the canal redirected the water, and ends with the concluding sentence summarizing the project's impact.
The correct sequence begins with the sentence introducing Chicago's public health crisis, which provides the background context. Next comes the sentence explaining the city's decision to reverse the river to address this threat. This is followed by the sentence detailing how the canal was excavated to redirect the flow. Finally, the paragraph concludes with a sentence summarizing the dual positive outcomes of the project.

Step-by-Step Solution

1
Identify the introductory sentence.
The sentence introducing Chicago's late nineteenth-century public health crisis is the logical starting point because it sets the context without relying on preceding information.
An effective introduction must establish the core topic and problem before any actions or solutions are discussed.
2
Find the logical transition and development.
The sentence beginning with 'To address this threat' must follow the introduction, followed by the sentence describing how engineers achieved the feat using the canal.
The demonstrative pronoun 'this threat' requires the antecedent 'public health crisis,' and the details of the canal explain how the reversal project ('this feat') was physically accomplished.
3
Identify the concluding sentence.
The sentence beginning 'By redirecting the river's flow' wraps up the paragraph by summarizing the overall results and significance of the project.
A strong conclusion should tie the narrative together and show the broader implications of the topic discussed.

Key Concept

Establishing logical paragraph flow using clear opening sentences, transition words, and summarizing concluding sentences.
Question 287Question

Spanning thousands of miles across the rugged Andes, the Inca Empire required a highly efficient communication system to maintain control over its vast territories. Without written language or wheeled vehicles, the Inca relied on the *chasquis*—agile messengers stationed along the royal road network, or *Qhapaq Ñan*. These runners operated in a relay system, passing messages, goods, and administrative orders from one outpost (*tambo*) to the next.

To maximize speed, chasquis were trained from youth for high-altitude endurance and speed. They carried a *pututu* (a conch-shell horn) to signal their arrival and a *quipu* (a knotted string device) containing encoded data. As a runner approached a *tambo*, he would blow the *pututu* to alert the next runner, who would begin running alongside him to memorize the message or receive the *quipu* without stopping. This relay method allowed messages to travel up to 150 miles per day, traversing steep peaks and deep gorges in a fraction of the time a single runner would take.

Although the Spanish conquest in the sixteenth century led to the rapid decline of the Inca state, the legacy of the chasquis endured. The Spanish initially kept the runner network active to send their own official correspondence across the difficult mountain terrain. Today, the ancient pathways of the *Qhapaq Ñan* remain a testament to this remarkable system.

Which choice most effectively concludes the passage by emphasizing the historical significance of the *chasquis*' communication network?

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Answer: These trails serve as a physical reminder of how a pre-alphabetic society established one of the most sophisticated postal networks of the ancient world.

Answer

These trails serve as a physical reminder of how a pre-alphabetic society established one of the most sophisticated postal networks of the ancient world.
The correct choice effectively summarizes the historical significance of the chasquis by linking the physical trails of the road system to their achievements, while maintaining grammatical correctness and consistency with the rest of the text.

Step-by-Step Solution

1
Analyze the passage context to determine the primary theme, which is the historical chasquis runner relay network and its efficiency in the Inca Empire.
The final sentence must transition from the physical pathways mentioned in the final paragraph to a conclusion emphasizing the historical significance of the system.
A good conclusion connects the immediate paragraph context to the overall thesis of the passage.
2
Evaluate the grammar and punctuation of each option to eliminate structurally flawed choices.
Three options contain grammatical errors: a comma splice, a semicolon fragment, and a dangling modifier.
Standard standardized testing questions require grammatically correct options.
3
Select the grammatically correct option that maintains the formal tone and reinforces the central theme of the communication network.
The correct option connects the physical pathways to the pre-alphabetic nature of the empire and its sophisticated communication network.
This option maintains consistency with the passage's opening themes and avoids grammatical errors.

Key Concept

Opening and Concluding Sentences
Question 288Question

Passage

When the Eiffel Tower was completed in 1889, it was intended to stand for only twenty years before being dismantled. [1] Otherwise, the monument was saved from destruction because of its value as a giant radio antenna for scientific experiments and military communications.

Which choice provides the most logical transition between the two sentences?

Show answer & explanation

Answer: . However, the

Answer

The correct option is '. However, the', which uses a period to separate the two independent clauses and the transitional word 'however' to show contrast.
The correct option correctly uses the transitional word 'however' preceded by a period to start a new sentence. The relationship between the two sentences is one of contrast: the first sentence describes the plan to dismantle the Eiffel Tower, while the second sentence describes how it was saved. Therefore, a contrast transition is needed, and starting a new sentence prevents a comma splice.

Step-by-Step Solution

1
Analyze the relationship between the two sentences.
The first sentence explains that the Eiffel Tower was meant to be temporary (standing for only twenty years before being dismantled). The second sentence explains that it was saved from destruction because of its utility as a radio antenna. This is a contrast relationship.
Identifying the logical relationship helps narrow down the correct transition word.
2
Evaluate the transition words in the options based on the identified relationship.
'Otherwise' and 'Furthermore' do not express contrast. 'However' correctly expresses contrast.
Eliminating incorrect transition types ensures logical cohesion.
3
Check the punctuation between the two independent clauses.
Both clauses are independent. Joining them with a comma and 'however' creates a comma splice. Therefore, a period must precede 'However' to separate the sentences properly.
Ensuring correct grammatical structure prevents punctuation errors.

Key Concept

Selecting the logically appropriate transition word and using correct punctuation to separate independent clauses.
Question 289Question

The following passage is about the discovery of the coelacanth, a prehistoric fish.

[1]
In December 1938, Marjorie Courtenay-Latimer, a South African museum curator, was inspecting a catch of fish brought in by a local trawler captain. Among the pile of common marine life lay a bizarre, five-foot-long creature with heavy, armor-like scales and unusual, limb-like lobed fins. Courtenay-Latimer, unable to identify the striking blue fish, dragged it back to her museum and sent a detailed sketch to J.L.B. Smith, an ichthyologist at Rhodes University. Smith immediately recognized the fish's prehistoric anatomy, identifying it as a coelacanth—a member of a primitive lineage believed to have gone extinct 66 million years ago.

[2]
This monumental find sent shockwaves through the global scientific community because it directly challenged established timelines of vertebrate evolution. Scientists were eager to study the coelacanth's unique anatomy, which seemed to represent a transitional link between ocean-dwelling fish and the first land-dwelling tetrapods. However, locating a second specimen to verify the species' survival proved to be an agonizingly slow endeavor. Smith launched an exhaustive fourteen-year search, distributing bilingual leaflets along the southeastern coast of Africa offering a reward for another specimen. In December 1952, a second coelacanth was finally caught near the Comoro Islands, proving that the 1938 specimen was not an isolated anomaly. _______

Which of the following choices, if added at the blank, provides the most effective and logical concluding sentence for the passage?

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Answer: This second catch confirmed the existence of a viable, surviving population of a prehistoric species that had managed to evade modern science.

Answer

The sentence that states that the second catch confirmed the existence of a viable, surviving population of a prehistoric species that had managed to evade modern science.
The correct option provides a strong conclusion by explaining the biological and historical significance of the second specimen, effectively wrapping up the search narrative. It maintains the academic, narrative tone of the passage and is grammatically correct.

Step-by-Step Solution

1
Analyze the passage's main idea and structure.
The passage details the discovery of a coelacanth in 1938 and the subsequent fourteen-year search to find a second specimen to prove that the species was not extinct.
Understanding the context allows the reader to identify what information a concluding sentence must wrap up.
2
Evaluate the choices for logical flow, relevance, and tone.
The correct option must conclude the narrative of the search by stating what the second catch proved, without shifting tenses or introducing off-topic geographical facts.
This step eliminates options that are off-topic or disrupt the narrative's resolution.
3
Check the remaining options for grammatical correctness.
The option beginning with 'Because' is a fragment, and the option using present tense verbs shifts tenses inconsistently. Only the correct option is both grammatically correct and contextually appropriate.
ACT English questions require sentences to be free of grammatical errors like fragments and improper tense shifts.

Key Concept

Selecting the most effective concluding sentence by ensuring it maintains paragraph unity, aligns with the passage's tone, and is grammatically correct.
Estimated Time:1m 30s
Question 290Question

Aerogel is composed of up to 99.8 percent air, giving it a delicate, ghost-like appearance. [1] _As a result, it_ is remarkably durable and can withstand significant pressure.

Which choice provides the most logical transition from the preceding sentence?

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Answer: Nevertheless, it

Answer

The transition 'Nevertheless, it' is the correct choice because it establishes the necessary contrast between aerogel's delicate appearance and its high durability.
The transition 'Nevertheless, it' correctly signals a contrast between the delicate appearance of aerogel (being made of 99.8 percent air) and its actual high durability, which is unexpected.

Step-by-Step Solution

1
Analyze the relationship between the two sentences.
The first sentence describes aerogel's delicate, air-like appearance, while the second sentence describes its surprising durability and strength.
Understanding how the two ideas relate is essential for choosing the correct transition.
2
Identify the logical connection required.
The second sentence presents a fact that contrasts with the expectation of fragility set by the first sentence. Thus, a contrast transition is needed.
The correct transition must reflect this contrast.
3
Evaluate the choices to find the contrast transition.
Only 'Nevertheless' functions as a contrast transition. 'As a result' indicates cause-effect, 'Furthermore' indicates addition, and 'Similarly' indicates comparison.
This confirms 'Nevertheless, it' is the correct option.

Key Concept

Selecting the appropriate transitional word or phrase to logically connect two sentences.
Estimated Time:1m 0s
Question 291Question

Passage

During the mid-twentieth century, geologist Marie Tharp worked to map the ocean floor using sonar data. Her detailed maps eventually revealed a massive, continuous rift valley running down the center of the Mid-Atlantic [1] Ridge. Consequently, her male colleagues dismissed her findings, mockingly attributing the rift to a mathematical error in her data.

Question 1
Which of the following choices best replaces the underlined portion marked [1] to establish a logical and grammatically correct transition between the two sentences?

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Answer: Ridge. Nevertheless, her

Answer

Ridge. Nevertheless, her
The correct option successfully uses 'Nevertheless' to indicate the logical contrast between the discovery of the rift valley and the colleagues' dismissal of it. By using a period to end the first sentence and placing the transition at the beginning of the next sentence, it maintains correct grammar and avoids a comma splice.

Step-by-Step Solution

1
Analyze the logical relationship between the sentence before the transition and the sentence after the transition.
The first sentence describes Marie Tharp's major scientific breakthrough of discovering a rift valley. The second sentence describes how her colleagues rejected this finding as an error. This shows a direct contrast between the significance of the work and its reception.
Transitions must logically connect the ideas of adjacent sentences.
2
Evaluate the transition choices to find the one that expresses contrast.
'Consequently' indicates cause-and-effect, and 'Moreover' indicates addition, so they are incorrect. 'Nevertheless' indicates contrast, which fits the meaning perfectly.
Only a contrastive transition makes sense of the colleagues' negative reaction to a successful mapping project.
3
Verify the punctuation required to join these two independent clauses.
Since both parts of the text are independent clauses, they must be separated by a period or semicolon. Using a comma before 'nevertheless' results in a comma splice, so the version with a period is correct.
Conjunctive adverbs like 'nevertheless' cannot be used to join two independent clauses with just a comma.

Key Concept

Identifying logical transition words between sentences and applying proper punctuation rules for conjunctive adverbs.
Question 292Question

The following sentences are from a paragraph about William Henry Perkin's accidental invention. Arrange the sentences in the most logical order to create a cohesive paragraph that begins with a clear introduction and ends with a strong concluding sentence.

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Answer

The most logical order of the sentences is: first, the sentence introducing William Henry Perkin's attempt to synthesize quinine; second, the sentence describing the resulting dark, sticky residue; third, the sentence about the residue dissolving into a purple liquid; fourth, the sentence detailing his realization that the solution could be used as a dye; and finally, the sentence concluding with the historical impact of the discovery.
The correct order follows a clear chronological and logical progression: introducing Perkin's initial experiment (quinine synthesis), describing the failed result (sticky residue), explaining how cleaning the residue produced a new substance (purple liquid), identifying the commercial potential of that substance (textile dye), and concluding with the global impact of the discovery (revolutionizing the fashion and chemical industries).

Step-by-Step Solution

1
Identify the introductory sentence.
The sentence introducing William Henry Perkin and his goal of synthesizing quinine is selected as the starting point.
An effective introduction must establish context (who, when, what) without relying on antecedent pronouns or references to previous information.
2
Find the immediate transition describing the experiment's outcome.
The sentence about the 'dark, sticky residue' is placed second.
The reference to 'the desired clear medicine' connects directly to the attempt to synthesize 'quinine' in the first sentence.
3
Identify the chemical reaction description.
The sentence describing the substance dissolving into a purple liquid is placed third.
The noun phrase 'the substance' needs an antecedent, which is the 'dark, sticky residue' from the second sentence.
4
Locate the transition from discovery to application.
The sentence explaining how the liquid could be a textile dye is placed fourth.
The phrase 'this accidental solution' refers to the 'purple liquid' described in the third sentence.
5
Determine the concluding sentence.
The sentence reflecting on the long-term impact on the fashion and chemical industries is placed last.
A strong conclusion should summarize the significance of the event and provide a sense of closure to the passage.

Key Concept

Logical paragraph flow relies on clear transitions, referencing pronouns (like 'this accidental solution' or 'the substance') to their proper antecedents, and placing general introductory and concluding thoughts at the boundaries of the paragraph.
Question 293Question

The following passage is about the Svalbard Global Seed Vault.

Deep within the permafrost of a remote Arctic island, one of humanity’s most vital backup systems lies buried. The Svalbard Global Seed Vault, located on the Norwegian archipelago of Svalbard, safeguards millions of seeds representing thousands of crop species from around the globe. Operating as a safety net for biodiversity, the vault functions as a secure repository to prevent accidental loss of plant genetics. Designed to withstand both natural disasters and man-made catastrophes, the heavily fortified facility serves as an ultimate insurance policy for the world's food supply. Inside this subterranean facility, crates of seeds are carefully stored and kept at a constant temperature of minus eighteen degrees Celsius, ensuring their viability for decades, if not centuries.

[1]

Historically, genebanks around the world have been vulnerable to wars, political instability, civil strife, and catastrophic natural disasters, which can easily obliterate decades of agricultural heritage in an instant. For instance, national seed vaults in Iraq and Afghanistan were completely destroyed during recent conflicts, resulting in the loss of irreplaceable crop varieties. Similarly, a powerful typhoon in the Philippines severely flooded and damaged another crucial depository, highlighting the vulnerability of centralized storage. By storing duplicate copies of these seeds in the stable, remote, and geologically inactive environment of Svalbard, participating countries can rebuild their agricultural systems if their domestic seed collections are lost. Ultimately, the vault represents a global effort to preserve agricultural biodiversity and secure future food systems against unpredictable global threats.

Given that all the choices are true, which choice at [1] provides the most effective transition from the preceding paragraph to the rest of the second paragraph?

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Answer: This secure, frozen repository is crucial because localized seed collections face constant threats.

Answer

The correct option is the one stating that the secure, frozen repository is crucial because localized seed collections face constant threats.
The correct option effectively links the two paragraphs by referencing the physical description of the vault ('This secure, frozen repository') established in the first paragraph, while introducing the central topic of the second paragraph, which focuses on the vulnerability of localized seed collections ('localized seed collections face constant threats').

Step-by-Step Solution

1
Analyze the end of the first paragraph and the beginning of the second paragraph to determine the transition logic.
The first paragraph describes the physical structure, location, and conditions of the Svalbard facility. The second paragraph discusses the historical vulnerability of local genebanks around the world to wars and natural disasters.
An effective transition must connect the idea of the secure Svalbard vault with the vulnerability of other seed collections.
2
Evaluate the choices for relevance, cohesion, and logical transition.
Only the option referring to the 'secure, frozen repository' and the 'constant threats' faced by local collections bridges these two topics directly.
This establishes a clear relationship between the solution (Svalbard) and the problem (threats to local collections).
3
Verify the grammatical correctness and stylistic tone of the choices.
The chosen option is grammatically correct and matches the formal, academic tone of the passage, while other options introduce grammatical fragments, irrelevant details, or overly informal language.
ACT English questions require the selected answer to be grammatically correct and stylistically consistent.

Key Concept

Opening and Concluding Sentences
Question 294Question

The following paragraphs are from an essay about the history of the Sahara Desert. To make the passage most logical and cohesive, in what order should the paragraphs be arranged?

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Answer

The paragraphs should be arranged in the sequence starting with the introduction of the African Humid Period, followed by the explanation of the orbital shifts, then the description of the monsoon's reversal and ecological collapse, and concluding with the discussion of the physical relics left behind.
The correct order follows a clear cause-and-effect timeline and relies on explicit transitional links. The introduction establishes the Green Sahara and attributes it to variations in Earth's orbit. The second paragraph begins with 'These orbital shifts' to explain the mechanism behind those variations. The third paragraph introduces a contrast ('however') detailing the reversal of these orbital parameters and the resulting ecological collapse, concluding with the mention of 'silent relics.' The final paragraph begins with 'These relics' to elaborate on the rock art and scientific evidence left behind.

Step-by-Step Solution

1
Identify the introductory paragraph.
The paragraph starting with 'Approximately eleven thousand years ago' sets the historical and geographical context of the African Humid Period and introduces the main topic, ending with a reference to 'periodic variations in Earth's orbit.'
An effective introductory paragraph must establish the topic before specific details or chronological developments are discussed.
2
Locate the paragraph that builds on the introduction's concluding thought.
The paragraph starting with 'These orbital shifts' explains the specific astronomical mechanism mentioned at the end of the introductory paragraph.
Cohesive transitions rely on linking the end of one paragraph to the beginning of the next using clear referential phrases like 'These orbital shifts' to resolve the antecedent.
3
Find the paragraph that contrasts the intensification of the monsoon with its decline.
The paragraph beginning with 'As these orbital parameters gradually reversed, however' introduces the decline and collapse of the wet period, directly contrasting with the monsoon intensification described previously.
The word 'however' and the reference to 'these orbital parameters' signal a shift in direction from the positive orbital effects explained in the second paragraph.
4
Determine the concluding paragraph.
The paragraph beginning with 'These relics' details the archaeological and environmental remnants, directly referencing the 'silent relics' mentioned at the end of the collapse paragraph.
The demonstrative phrase 'These relics' requires the antecedent 'silent relics' to make logical sense, locking this paragraph into the final position.

Key Concept

Establishing logical paragraph-level transitions by tracing lexical links, transitional pronouns, and contrasting ideas between consecutive paragraphs.
Question 295Question

[1]
In the summer of 1888, the American inventor George Eastman revolutionized photography by introducing the first Kodak camera. This lightweight, handheld box came pre-loaded with a roll of paper film, making photography accessible to the general public for the first time.

[2]
To use the camera, customers simply had to press a button, turn a key, and pull a cord. Once the hundred frames on the roll were exposed, they sent the entire camera back to the Kodak factory in Rochester, New York, along with a ten-dollar fee.

[3]
At the factory, technicians developed the film, printed the photographs, and loaded a fresh roll of film into the camera. The company then mailed the finished prints and the loaded camera back to the customer, embodying their famous slogan: "You press the button, we do the rest."

[4]
Before Eastman’s ground-breaking invention, however, photography had been a cumbersome and expensive hobby. Photographers had to carry heavy glass plates, toxic chemicals, and bulky tripods just to take a single picture.

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

Show answer & explanation

Answer: before Paragraph 1

Answer

before Paragraph 1
The correct option is the one that places the paragraph before Paragraph 1. Paragraph 4 describes the state of photography before George Eastman's invention, using the transition phrase 'Before Eastman’s ground-breaking invention, however...'. This historical context logically sets up the introduction of the Kodak camera in Paragraph 1. Furthermore, Paragraphs 1, 2, and 3 form an uninterrupted sequence: Paragraph 1 introduces the camera, Paragraph 2 explains how to use 'the camera' and mentions the Kodak factory, and Paragraph 3 begins 'At the factory'. Placing Paragraph 4 before Paragraph 1 preserves this flow and provides a clear chronological contrast.

Step-by-Step Solution

1
Analyze the content and transition clues of the paragraph to be moved (Paragraph 4).
Paragraph 4 details the cumbersome nature of photography before Eastman's invention, utilizing the transition 'Before Eastman’s ground-breaking invention, however...'. This indicates it should precede the introduction of Eastman's invention.
Identifying transition words and chronological markers is essential for establishing logical order.
2
Examine the connections between the other paragraphs to see if they form an inseparable chain.
Paragraph 1 introduces the Kodak camera. Paragraph 2 explains how to use 'the camera' and mentions sending it to the Kodak factory. Paragraph 3 describes the process 'At the factory'. Thus, the sequence of Paragraphs 1, 2, and 3 is tightly linked and cannot be interrupted.
Understanding pronoun references and location-based transitions prevents placing a paragraph where it breaks existing cohesion.
3
Determine the final placement of Paragraph 4 based on chronology and cohesion.
Since Paragraph 4 must come before the invention is introduced, and Paragraphs 1, 2, and 3 cannot be separated, Paragraph 4 must be placed before Paragraph 1.
Placing the historical baseline at the very beginning of the essay establishes a logical, chronological progression.

Key Concept

Analyzing transition words and pronoun references to establish chronological and logical order among paragraphs.
Question 296Question

[1] In 1938, Marjorie Courtenay-Latimer, a South African museum curator, recognized a strange blue fish caught by a local trawler as something extraordinary. The specimen was soon identified as a coelacanth, a prehistoric fish thought to have gone extinct 66 million years ago.

[2] This second find confirmed that the coelacanth was not an isolated anomaly but rather a member of a surviving, active population. Today, marine biologists use advanced submersibles to study these "living fossils" in their deep-sea habitats.

[3] The initial discovery shocked the scientific community, prompting a decade-long search for another specimen. J.L.B. Smith, a South African chemist and passionate ichthyologist, dedicated himself to scouring the coastlines of the western Indian Ocean.

[4] His dedication finally paid off in 1952, when a fisherman captured another coelacanth near the Comoro Islands.

To make the essay most logical and cohesive, where should Paragraph 2 be placed?

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Answer: after Paragraph 4

Answer

Paragraph 2 should be placed after Paragraph 4.
Placing Paragraph 2 after Paragraph 4 is correct because Paragraph 4 describes the capture of the second coelacanth in 1952. This event directly serves as the logical referent for the phrase 'This second find' at the beginning of Paragraph 2. Additionally, the transition to modern research ('Today...') in Paragraph 2 serves as a strong conclusion to the essay.

Step-by-Step Solution

1
Identify structural, chronological, or grammatical clues in Paragraph 2.
Paragraph 2 begins with 'This second find,' which is a demonstrative phrase requiring a previously mentioned second discovery as its referent.
Tracking demonstrative adjectives helps locate the preceding context needed for paragraph cohesion.
2
Scan the rest of the essay to locate where the second discovery is introduced.
Paragraph 4 describes the capture of 'another coelacanth' in 1952, which constitutes the second find.
Finding the specific event described by the phrase ensures logical transition flow.
3
Test the entire sequence with Paragraph 2 placed after Paragraph 4.
The essay logically moves from the 1938 discovery (Paragraph 1), to the subsequent decade of searching (Paragraph 3), to the success of the search in 1952 (Paragraph 4), and ends with the evaluation of the second find and modern research (Paragraph 2).
Ensuring the entire narrative follows a coherent chronological and logical order validates the placement.

Key Concept

Paragraph placement is determined by identifying transition words, chronological indicators, and demonstrative pronouns/adjectives (such as 'this' or 'these') that link paragraphs together in a logical sequence.
Estimated Time:1m 15s
Question 297Question

The following paragraphs are taken from an essay about the development of the Cherokee syllabary. In what order should the paragraphs be arranged to create the most logical and coherent essay?

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Answer

The paragraphs must be arranged in the order of Sequoyah's initial motivation, his early struggles with a pictographic system, his phonetic breakthrough with the 85-syllable writing system, and the eventual demonstration and national adoption of the syllabary.
The logical flow of the essay moves chronologically from the initial inspiration in 1809, to the first unsuccessful pictographic method, to the development of the successful phonetic syllabary, and finally to its public validation and widespread adoption.

Step-by-Step Solution

1
Identify the introductory paragraph.
The paragraph introducing Sequoyah, the year 1809, and his motivation to create the 'talking leaves' is established as the starting point.
An essay must establish its central figure, historical context, and primary objective before describing subsequent attempts and developments.
2
Find the transition to Sequoyah's first attempts.
The paragraph starting with 'Initially' follows the introduction.
The word 'Initially' signals the first step in his design process, directly linking back to the goal established in the introduction.
3
Connect the change in strategy to the breakthrough.
The paragraph discussing the discovery of vowel and consonant sounds is placed third.
The end of the previous paragraph notes that he abandoned pictographs to analyze spoken language; this paragraph starts with 'He discovered that Cherokee speech was composed of repeating combinations...', which is the direct result of that analysis.
4
Determine the concluding paragraph.
The paragraph discussing the demonstration of the system to the council and its wide adoption concludes the essay.
The phrase 'To demonstrate the system's utility' refers directly to the finished syllabary described in the prior paragraph, and the widespread literacy and newspaper publication represent the historical resolution.

Key Concept

Paragraph Reordering and Placement
Estimated Time:1m 30s
Question 298Question

The following paragraphs are from an essay about the preservation of natural soundscapes. In what order should the paragraphs be arranged to establish the most logical transitions and create a coherent essay?

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Answer

The correct order of the paragraphs is: the introduction to acoustic ecology, the paragraph detailing anthropogenic noise threats, the paragraph describing the sound monitoring study in Olympic National Park, and the concluding paragraph discussing policy changes.
The correct order follows a clear cause-and-effect and problem-solution structure. The essay begins by introducing acoustic ecology, transitions to the threats of industrialization, explains how those threats were measured, and concludes with the policy changes inspired by the findings.

Step-by-Step Solution

1
Identify the introductory paragraph of the essay.
The paragraph introducing 'acoustic ecology' and the concept of soundscapes as natural resources serves as the logical starting point.
It establishes the core concept without relying on prior context or transitions.
2
Establish the connection to the threat of noise.
The paragraph discussing the expansion of industrialization and tourism and the resulting anthropogenic noise threats follows next.
It directly refers to 'these delicate auditory environments' introduced in the first paragraph and highlights the need to 'quantify the damage.'
3
Connect the need for quantification to the scientific study.
The paragraph describing the sound monitoring projects in Olympic National Park comes third.
The opening phrase 'To measure this impact' directly resolves the previous paragraph's call to 'quantify the damage.'
4
Trace the transition to the final outcomes.
The paragraph mentioning the implementation of 'quiet zones' and park policies is the logical conclusion.
It begins with 'Armed with these findings,' referencing the data gathered in the third paragraph, and offers a concluding outlook.

Key Concept

Paragraph-Level Transitions
Estimated Time:1m 30s
Question 299Question

The writer wants to organize the sentences of a draft paragraph to logically trace how a persistent experimental anomaly led to a major cosmological discovery. To achieve this goal, what is the most logical sequence for the following sentences?

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Answer

The correct logical order of the sentences is: the calibration of the horn antenna, the detection of the unexpected low-temperature hum, the cleaning attempts to resolve the interference, the introduction of the Princeton theorists' calculations, and finally the sharing of data that identified the hum as the cosmic microwave background.
The narrative must begin by introducing the astronomers and their antenna calibration. The next logical step is the complication of the constant hum, which is immediately followed by the efforts to scrub the horn's interior to eliminate it. The paragraph then transitions to the Princeton theorists working on the same background radiation in parallel. Finally, the astronomers share their data with the Princeton theorists, resolving the source of the noise as the cosmic microwave background.

Step-by-Step Solution

1
Identify the introductory sentence.
The sentence introducing Arno Penzias, Robert Wilson, and their initial project calibrating the horn antenna must come first because it establishes the primary subjects and setting.
This sets the stage for the narrative and defines the actors and the equipment before any actions or anomalies are described.
2
Identify the direct contrast or complication.
The sentence noting that their instrument detected a constant, low-temperature hum instead of a clean signal logically follows the description of their calibration attempts.
The transition 'Instead of a clean signal, however' directly contrasts with the goal of calibrating the antenna to measure radio waves.
3
Link the reaction to the complication.
The sentence describing the cleaning of the structure's interior to eliminate what they assumed was local interference must come next.
The pronoun 'they' and the phrase 'what they assumed was local interference' refer back to Penzias and Wilson and the constant hum introduced in the previous step.
4
Introduce the parallel context.
The sentence introducing the Princeton theorists' calculations of thermal radiation must precede the final resolution.
The phrase 'Unbeknownst to the two astronomers' functions as a transition to a separate, simultaneous storyline that explains the true nature of the hum.
5
Determine the concluding resolution.
The sentence where Penzias and Wilson share their data with the Princeton group, revealing the hum is the cosmic microwave background, is the logical conclusion.
It resolves both the technical nuisance of the astronomers and the theoretical search of the Princeton group, wrapping up the paragraph's rhetorical goal of linking the anomaly to the cosmological discovery.

Key Concept

Logical sequence and paragraph unity/cohesion using transitional words, pronouns, and narrative flow.
Question 300Question

The following passage is an excerpt from a science report about insect behavior.

Many people believe that honeybees search for food completely at random. Therefore, these insects use a complex 'waggle dance' to share the exact coordinates of flowers with the rest of the hive.

Which choice provides the most logical transition from the preceding sentence?

Show answer & explanation

Answer: In fact,

Answer

The transition 'In fact,' most logically connects the sentences by presenting a factual correction to the common misconception introduced in the first sentence.
The transition 'In fact,' is correct because it introduces a contrasting, clarifying truth that refutes the common misconception stated in the previous sentence.

Step-by-Step Solution

1
Analyze the relationship between the first sentence and the second sentence.
The first sentence discusses a common misconception (that bees search randomly), while the second sentence introduces a fact about their actual, organized communication system (the waggle dance).
Understanding the logical connection between the ideas is necessary to choose the correct transition.
2
Evaluate the type of transition required to link a misconception to a correcting fact.
A transition that emphasizes reality or contrasts with the misconception, such as 'In fact,' is needed.
This ensures the sentence flow is logical and accurate.
3
Test the given options against this logical requirement.
'NO CHANGE' (Therefore) suggests cause-and-effect; 'For example' suggests illustration; 'Similarly' suggests comparison. Only 'In fact' correctly signals that the second sentence is correcting the first.
Eliminating incorrect transition categories leaves the correct relationship.

Key Concept

Selecting the correct transition word to establish a logical relationship between sentences.
Estimated Time:45s
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Organization, Unity, and Cohesion Practice Questions — ACT — Page 15 | Examkin