Organization, Unity, and Cohesion

302 questions

Question 141Question

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?

Show answer & explanation

Answer: Once the script was deciphered, the contents of the tablets revealed a surprisingly bureaucratic reality.

Answer

The correct answer is the sentence stating that once the script was deciphered, the contents of the tablets revealed a surprisingly bureaucratic reality.
The sentence stating that once the script was deciphered, the contents of the tablets revealed a surprisingly bureaucratic reality is correct because it creates a seamless transition from the decipherment of the Greek dialect at the end of the second paragraph to the description of the mundane clay tablet contents at the start of the third. It is also grammatically correct and maintains the passage's formal tone.

Step-by-Step Solution

1
Analyze the end of the second paragraph and the beginning of the third paragraph to identify the transition requirements.
The second paragraph ends with the discovery that the tablets were written in an archaic Greek dialect (decipherment). The third paragraph describes the actual contents of the tablets (administrative lists of sheep, oil, etc. rather than poetry).
An effective transition must bridge these two ideas: the act of decipherment and the nature of the contents revealed.
2
Evaluate the choices for grammatical correctness and sentence structure.
Three options contain grammatical errors: one is a dependent clause fragment beginning with 'Although', one has a dangling modifier where 'the tablets' are incorrectly modified by the purpose of understanding the economy, and one incorrectly uses a semicolon to connect a dependent clause starting with 'which'. Only the sentence starting with 'Once the script was deciphered' is grammatically correct.
ACT English questions require the correct choice to be grammatically precise and free of syntax errors.
3
Select the option that is both grammatically correct and provides the most logical flow.
The sentence starting with 'Once the script was deciphered' smoothly links the resolution of the mystery (decipherment) to the mundane nature of the records described in the rest of the paragraph.
This option satisfies both the grammatical constraints and the rhetorical purpose of paragraph unity and cohesion.

Key Concept

Opening and Concluding Sentences
Estimated Time:1m 0s
Question 142Question

The following passage describes the reception of the potato in Europe.

[1] When Spanish conquistadors first brought the potato to Europe in the sixteenth century, the unfamiliar tuber was met with suspicion. [2] Many Europeans feared the vegetable because it was not mentioned in the Bible, and others suspected it of causing leprosy. [3] In France, the crown even went so far as to ban potato cultivation entirely in 1748. [4] Recognizing the crop's potential to combat famine, French army pharmacist Antoine-Augustin Parmentier set out to change public perception. [5] He established heavily guarded potato patches near Paris, instructing the guards to accept bribes and look the other way when locals tried to steal the "royal" plants.

To make the paragraph flow most logically, where should the following sentence be placed?

"This clever reverse-psychology campaign succeeded in generating curiosity and ultimately popularized the crop."

Show answer & explanation

Answer: after Sentence 5

Answer

after Sentence 5
Placing the target sentence after the final sentence of the paragraph is the most logical choice because 'This clever reverse-psychology campaign' directly refers to the strategy detailed in the fifth sentence (guarding the patches but allowing thefts). This placement allows the target sentence to serve as a conclusion to the anecdote by stating the outcome of the campaign.

Step-by-Step Solution

1
Analyze the target sentence for logical and transitional clues.
The target sentence begins with the demonstrative noun phrase 'This clever reverse-psychology campaign,' indicating it must immediately follow a description of a specific campaign or action that utilizes reverse psychology.
Identifying transition markers and pronoun/determiner referents is essential for determining correct sentence placement.
2
Evaluate the paragraph's sentences to find where the campaign is described.
Sentence 5 describes Parmentier setting up heavily guarded potato patches and instructing guards to look the other way when locals tried to steal them, which is a classic example of reverse psychology.
Locating the antecedent for 'This clever reverse-psychology campaign' ensures the narrative flow remains logical.
3
Test the proposed placement to ensure chronological and thematic coherence.
Placing the target sentence at the end of the paragraph (after Sentence 5) allows it to function as a logical conclusion, detailing the success of the campaign described in Sentence 5.
Verifying that the chosen insertion point does not disrupt other parts of the paragraph confirms the correct placement.

Key Concept

Sentence Reordering and Placement
Estimated Time:1m 30s
Question 143Question

For decades, archaeologists assumed that the tiny, white mineral chunks scattered throughout ancient Roman concrete were simply the result of sloppy mixing [1] practices. Consequently, these 'lime clasts' actually serve a vital function: they dissolve when water enters cracks, recrystallizing to seal the damage from within.

Which of the following choices provides the most logical transition between the sentences while maintaining correct sentence structure?

Show answer & explanation

Answer: practices. However, these

Answer

The option stating 'practices. However, these' is the correct answer because it uses the correct contrast transition to link the two sentences and uses a period to avoid a comma splice.
The correct choice is the one that uses the transition word 'However' to signal contrast and a period to separate the two independent clauses. The passage contrasts the initial assumption that the mineral chunks were the result of sloppy mixing with the discovery that they serve a vital self-healing function.

Step-by-Step Solution

1
Analyze the logical relationship between the first sentence and the second sentence.
The first sentence describes an assumption of poor mixing ('sloppy mixing practices'), while the second sentence reveals a beneficial function ('serve a vital function'). This requires a transition of contrast (such as 'however'), not cause-and-effect ('consequently').
Identifying the correct relationship allows us to eliminate choices that use incorrect transitions.
2
Evaluate the grammatical structure of the sentence with the correct transition.
Both 'For decades... practices' and 'these lime clasts... within' are independent clauses. Joining them with a comma and the conjunctive adverb 'however' creates a comma splice.
Semicolons or periods must be used to separate independent clauses when connected by conjunctive adverbs like 'however'.
3
Select the option that features the correct logical transition and proper punctuation.
The option 'practices. However, these' correctly uses a period to separate the clauses and 'However' to show contrast.
This satisfies both the logical cohesion and the grammatical rules of the sentence.

Key Concept

Sentence-Level Transitions
Question 144Question

For decades, scientists struggled to explain how geckos could effortlessly scale smooth vertical walls and even walk upside down on polished glass ceilings. Traditional hypotheses involving sticky secretions or microscopic suction cups were repeatedly disproven. It was not until the early 2000s2000\text{s} that researchers confirmed that the gecko's grip relies on van der Waals forces—weak electromagnetic attractions between molecules. This phenomenon is facilitated by millions of microscopic hair-like structures called setae branching into even smaller spatulae, which conform so closely to the surface that they create a molecular bond. [1] However, this adhesion is not permanent; by changing the angle of their toes, geckos can instantly break these bonds to take another step.

The writer wants to add a sentence at Point [1] that provides a concrete, quantitative illustration of the immense strength of these combined molecular forces to emphasize how powerful this microscopic mechanism is. Which choice most effectively accomplishes this goal?

Show answer & explanation

Answer: The cumulative effect of these millions of microscopic contact points is so powerful that, if fully engaged, the forces could support a load of up to 280 pounds280\text{ pounds}.

Answer

The correct choice is the sentence that states the cumulative effect of the microscopic contact points is so powerful that they could support a load of up to 280 pounds280\text{ pounds}.
The correct choice is the sentence stating that the cumulative effect of the microscopic contact points is so powerful that they could support a load of up to 280 pounds280\text{ pounds}. This option directly satisfies the writer's goal of providing a concrete, quantitative illustration of strength (using the specific figure of 280 pounds280\text{ pounds}) while remaining grammatically correct.

Step-by-Step Solution

1
Analyze the rhetorical goal specified in the prompt.
The prompt requires a sentence that provides a concrete, quantitative illustration of the strength of the combined molecular forces to emphasize their power.
This establishes the precise criteria that the correct choice must meet.
2
Evaluate each option against the rhetorical goal.
Only the option mentioning the ability to support a load of up to 280 pounds280\text{ pounds} provides a concrete, quantitative illustration of the force's strength. The option detailing the 200 nanometers200\text{ nanometers} width describes size, the option mentioning surface area describes physical space, and the option discussing individual attractions lacks a quantitative measure.
This filters out choices that do not satisfy the writer's specific rhetorical goals.
3
Evaluate the grammatical correctness of the choices.
The correct option is a complete, grammatically sound sentence. The other options introduce grammatical or punctuation errors: one is a sentence fragment starting with a subordinating conjunction, another is a comma splice, and the last incorrectly uses a semicolon after a dependent clause.
This confirms that the chosen option meets both rhetorical and grammatical standards.

Key Concept

Fulfilling Specific Rhetorical and Writing Goals
Estimated Time:1m 30s
Question 145Question

For centuries, stained glass windows have been used to tell stories and bring vibrant color to places of worship. During the Gothic period, medieval artists created these windows by mixing metallic oxides into molten glass. Copper was added to make red or blue glass, while cobalt yielded a deep, rich blue. [1] Modern stained glass artists often use copper foil to wrap individual pieces of glass before soldering them together. Today, these historical windows are carefully preserved, allowing modern viewers to appreciate their beauty and narrative power.

The writer is considering deleting Sentence 1 from the paragraph. Should the sentence be kept or deleted?

Show answer & explanation

Answer: Deleted, because it introduces details about modern craft techniques that interrupt the paragraph's focus on medieval stained glass.

Answer

The sentence should be deleted because it introduces details about modern craft techniques that interrupt the paragraph's focus on medieval stained glass.
The correct answer states that the sentence should be deleted because it introduces details about modern craft techniques that interrupt the paragraph's focus on medieval stained glass. This is correct because the rest of the paragraph describes the history, chemistry, and preservation of medieval stained glass. Introducing a detail about modern soldering and copper foil disrupts the historical narrative.

Step-by-Step Solution

1
Identify the main topic of the paragraph.
The paragraph focuses on the history, creation methods, and preservation of medieval stained glass windows.
To determine if Sentence 1 is relevant, we must first establish the central theme of the surrounding text.
2
Analyze the content and purpose of Sentence 1.
Sentence 1 discusses modern stained glass artists and their use of copper foil and soldering.
To compare the sentence's content against the paragraph's central focus.
3
Evaluate whether the sentence should be kept or deleted.
The sentence is off-topic and interrupts the historical flow, so it should be deleted.
Sentences that deviate from the main focus of a passage should be removed to maintain unity.

Key Concept

Evaluating the relevance of a sentence to maintain paragraph unity and cohesion
Estimated Time:45s
Question 146Question

The writer wants to arrange the following sentences to logically trace how a highly classified military surveillance technology unexpectedly became an invaluable tool for marine biologists. What is the most logical order for these sentences?

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The most logical order is to start with the introduction of SOSUS, followed by the detection of mysterious sounds, then the transition when scientists were granted access to the classified recordings, and finally the discovery that the signals were whale songs.
The correct order follows a clear chronological and logical progression. First, the Sound Surveillance System (SOSUS) is introduced along with its military purpose. Second, the text explains that these underwater hydrophones ('these sensitive listening posts') picked up mysterious hums. Third, it recounts that these audio files ('these recordings') were classified until the late 1980s when scientists were given access. Finally, it describes the outcome of that access: biologists identifying the signals as whale songs, which fulfills the rhetorical goal.

Step-by-Step Solution

1
Identify the introductory sentence.
The sentence introducing the Sound Surveillance System (SOSUS) in the 1950s serves as the logical starting point, as it provides the necessary context and defines the technology without relying on preceding information.
An introductory sentence must establish the topic independently.
2
Link the second sentence using pronoun/demonstrative references.
The sentence beginning with 'these sensitive listening posts' must follow the introduction because 'listening posts' refers back to the 'underwater hydrophones' in the introduction.
Cohesive markers like 'these' require an antecedent in the previous sentence.
3
Connect the next chronological development.
The sentence noting that 'these recordings' remained classified before being shared in the 1980s follows, as 'these recordings' refers to the 'strange, low-frequency hums' picked up by the listening posts.
This establishes the transition of the data from military classification to civilian scientific access.
4
Determine the concluding resolution.
The sentence explaining that biologists recognized 'these mystery signals' as whale songs resolves the narrative by showing the outcome of scientific access.
This completes the rhetorical goal of explaining how submarine surveillance tech became a tool for marine biology.

Key Concept

Logical sentence sequencing using reference words (pronouns, demonstratives) and narrative structure to achieve specific rhetorical goals.
Question 147Question

The following paragraphs are from a draft of an essay about the London Underground map. Arrange the paragraphs in the most logical order to create a cohesive essay.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct paragraph order is: the paragraph starting with 'In the early twentieth century...', followed by the paragraph starting with 'An engineering draftsman named Harry Beck...', then the paragraph starting with 'In 1931, Beck submitted...', and concluding with the paragraph starting with 'This overwhelming success...'.
The correct order follows a logical progression from problem to solution, followed by testing and long-term legacy. The first paragraph introduces the problem of the early London Underground map's geographical clutter. The second paragraph introduces Harry Beck and his circuit-inspired solution, referencing 'this geographical accuracy' from the first paragraph. The third paragraph details the 1931 submission of 'his radical new design' and the subsequent successful trial run. The fourth paragraph concludes the essay by referencing 'This overwhelming success' and describing the map's lasting legacy.

Step-by-Step Solution

1
Identify the introductory paragraph.
The paragraph describing the initial geographic chaos of the early twentieth-century London Underground map must come first.
It establishes the historical context and the problem that the essay's subject (Harry Beck) will solve.
2
Connect the introduction to the developer of the map.
The paragraph introducing Harry Beck and his circuit-diagram concept must follow the introduction.
It uses the demonstrative phrase 'this geographical accuracy' to refer directly back to the physical sprawl and station clustering described in the first paragraph.
3
Trace the chronological progression of the map's submission.
The paragraph detailing the 1931 submission and the 1933 trial print run must come third.
It chronologically follows the creation of the design described in the second paragraph and uses 'his radical new design' to refer to that concept.
4
Identify the conclusion.
The paragraph discussing the map's massive success and lasting global legacy must be the final paragraph.
It begins with 'This overwhelming success,' which links directly back to the sold-out trial run in the third paragraph, and summarizes the long-term impact.

Key Concept

Identifying transition words, pronoun-antecedent links, and chronological progression to logically order paragraphs.
Estimated Time:2m 0s
Question 148Question

Each spring, maple syrup producers in New England harvest sap from sugar maple trees. To do this, they drill small holes into the tree trunks and insert metal or plastic taps called spiles. Sap, which is mostly water with a low sugar content, drips slowly from these spiles into hanging buckets or plastic tubing. *Sugar maple trees can grow up to eighty feet tall and live for over three hundred years.* This harvested sap is then collected and boiled in large pans inside a sugarhouse. Boiling evaporates the excess water, concentrating the sugars until it becomes the thick, sweet syrup enjoyed on pancakes and waffles.

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

Show answer & explanation

Answer: Deleted, because it interrupts the paragraph's discussion of the process of harvesting and refining maple sap with unrelated facts about the tree's size and lifespan.

Answer

The sentence should be deleted because it interrupts the paragraph's discussion of the process of harvesting and refining maple sap with unrelated facts about the tree's size and lifespan.
The correct answer is the option suggesting the sentence be deleted because it interrupts the paragraph's explanation of the process of harvesting and processing maple sap. The paragraph is structured to describe the steps of making syrup, and details about the physical size and age of the trees do not support this description.

Step-by-Step Solution

1
Analyze the focus of the surrounding paragraph.
The paragraph details the chronological sequence of maple syrup production: tapping trees, collecting sap, and boiling it to evaporate water.
Identifying the paragraph's main theme allows you to evaluate whether the sentence in question contributes to that theme.
2
Evaluate the relevance of the italicized sentence.
The sentence describes how tall sugar maple trees grow and how long they live.
This step determines whether the information about the tree's growth and lifespan fits the step-by-step process of syrup production.
3
Determine the correct action and justification.
Since the sentence interrupts the flow of the process description with tangential information, it should be deleted. The justification stating that it interrupts the process of harvesting and refining sap is the correct choice.
This completes the evaluation by aligning the decision to delete with the logical reason that the sentence is off-topic.

Key Concept

Evaluating sentence relevance to maintain paragraph unity and cohesion.
Estimated Time:50s
Question 149Question

[1] In 1911, the Italian archaeologist Luigi Pernier discovered the Phaistos Disc in the ruins of a Minoan palace in Crete. [2] The clay disc, covered on both sides with a spiral of stamped symbols, remains one of archaeology’s most famous undeciphered mysteries. [3] Many scholars have tried to decode the 242 signs, which feature representations of human figures, animals, and plants. [4] Some researchers suggest the disc records a sacred hymn, while others argue it is a legal document or a board game. [5] Because the symbols are stamped rather than hand-carved, the disc represents an early precursor to movable type printing, developed thousands of years before Johannes Gutenberg's press.

Given the passage above, the writer is considering adding the following sentence to the end of the paragraph:

"Gutenberg's invention of the printing press in fifteenth-century Germany revolutionized the dissemination of knowledge across Europe."

Should the writer make this addition?

Show answer & explanation

Answer: No, because it introduces a topic—the historical impact of Gutenberg’s press—that deviates from the paragraph's primary focus on the Phaistos Disc.

Answer

The writer should not add the sentence because it introduces a topic (the historical impact of Gutenberg's press) that deviates from the paragraph's primary focus on the Phaistos Disc.
The correct choice correctly identifies that the proposed sentence should not be added because it introduces a new topic—the impact of Gutenberg's press—which is irrelevant to the paragraph's main focus on the Phaistos Disc.

Step-by-Step Solution

1
Analyze the main topic and focus of the existing paragraph.
The paragraph describes the discovery of the Phaistos Disc, its undeciphered symbols, and its status as an early precursor to movable type printing.
To determine if the proposed sentence is relevant, we must first establish the paragraph's central theme.
2
Evaluate the content of the proposed sentence.
The proposed sentence details how Gutenberg's press revolutionized the dissemination of knowledge in Europe.
This allows us to compare the proposed sentence's content with the paragraph's established theme.
3
Determine whether the proposed sentence contributes to the paragraph's focus or diverges from it.
Although Gutenberg is mentioned in the final sentence of the paragraph, expanding on the societal impact of his press shifts the focus away from the Phaistos Disc.
In ACT English, additions that introduce off-topic information should be rejected, even if they have a loose connection (surface relevance) to a word in the passage.

Key Concept

Evaluating relevance when making sentence addition decisions
Question 150Question

Passage:
In 1957, engineers Alfred Fielding and Marc Chavannes sealed two plastic shower curtains together, trapping pockets of air between them. They hoped this textured material would become a popular new home wallpaper. [1] Therefore, consumers showed little interest in decorating their walls with plastic sheets. The inventors did not despair; instead, they successfully marketed their product as 'Bubble Wrap' for protective packaging.

Question:
Which choice provides the most logical transition at [1]?

Show answer & explanation

Answer: However,

Answer

The transition word 'However,' which correctly establishes a relationship of contrast.
The transition word 'However,' is correct because it signals contrast. The passage sets up an expectation in the first sentence (the hope that the plastic material would become popular wallpaper) and contrasts it with reality in the second sentence (consumers showed little interest).

Step-by-Step Solution

1
Analyze the relationship between the two connected sentences.
Sentence 1 describes a positive expectation (hoping the material would become popular wallpaper). Sentence 2 describes a negative reality (consumers showing little interest).
Understanding the logic linking the ideas is necessary to choose the correct transition.
2
Identify the type of transition needed.
A contrast transition is needed to connect a positive expectation with a negative outcome.
Selecting the right logical category (contrast, addition, cause-effect, illustration) narrows down the choices.
3
Evaluate the choices to find the one that fits this transition type.
The word 'However' indicates contrast and fits the context. The others (Therefore, Furthermore, For instance) indicate cause-and-effect, addition, and illustration respectively.
Matching the transition category with the correct vocabulary word yields the right answer.

Key Concept

Sentence-level transitions signal the logical relationships between ideas in consecutive sentences.
Question 151Question

The following passage is about the early history of color photography:

In the early 1900s, chemist and photographer Sergey Prokudin-Gorsky embarked on a monumental project to document the vast Russian Empire. Recognizing that traditional black-and-white photography failed to capture the vibrant cultures and diverse landscapes of the region, he developed a specialized camera. This camera rapidly exposed three black-and-white glass plates through red, green, and blue filters. By projecting these plates using three corresponding light sources, he reconstructed full-color images. [1] The Tsar, Nicholas II, was so impressed by a demonstration of these images that he provided Prokudin-Gorsky with a specially equipped railroad car darkroom and the necessary travel permits to document the empire.

The writer wants to add a sentence at Point [1] that highlights the groundbreaking nature of Prokudin-Gorsky’s technological achievement before explaining the Tsar's reaction. Which choice most effectively fulfills this goal?

Show answer & explanation

Answer: This ingenious process yielded remarkably vivid, full-color photographs decades before color film became commercially available.

Answer

This ingenious process yielded remarkably vivid, full-color photographs decades before color film became commercially available.
The correct option is grammatically correct and directly satisfies the writer's goal of highlighting the pioneering and groundbreaking nature of Prokudin-Gorsky's technology. By noting that this process achieved full-color photos decades before commercial color film, it emphasizes the advanced state of his technology.

Step-by-Step Solution

1
Analyze the prompt to identify the specific rhetorical goal.
The goal is to highlight the groundbreaking nature of the color photography technology at Point [1].
This establishes the criteria for the correct choice.
2
Evaluate the grammar of each option.
The option beginning with 'His method was entirely unique' is a comma splice, and the option starting with 'Because he hoped' is a fragment, eliminating both on grammatical grounds.
ACT English requires all correct choices to be grammatically correct.
3
Compare the remaining grammatically correct options against the rhetorical goal.
The option about the process yielding images decades before commercial color film highlights technological innovation. The option about traveling thousands of miles focuses on logistics and physical effort, not technology.
The correct choice must satisfy the specific prompt criteria rather than general relevance.

Key Concept

Fulfilling Specific Rhetorical and Writing Goals
Estimated Time:1m 0s
Question 152Question

[1] At the ancient Mayan city of Chichen Itza, the pyramid known as El Castillo displays a remarkable acoustic phenomenon. [2] When a visitor claps their hands at the base of the staircase, the echo returning from the temple at the summit sounds uncannily like the chirp of the resplendent quetzal, a bird sacred to the Maya. [3] Some archaeologists argue that this acoustic effect was intentional, engineered by Mayan architects to evoke the voice of their deities during ceremonies. [4] The quetzal was highly valued for its vibrant green tail feathers, which were used to make elaborate headdresses for royalty. [5] Skeptics, however, maintain that the chirp is merely an accidental byproduct of the staircase's stair-step geometry.

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

Show answer & explanation

Answer: Deleted, because it introduces details about the quetzal's feathers that are irrelevant to the paragraph's discussion of the pyramid's acoustic properties.

Answer

Deleted, because it introduces details about the quetzal's feathers that are irrelevant to the paragraph's discussion of the pyramid's acoustic properties.
The correct option correctly states that Sentence 4 should be deleted because it introduces details about the quetzal's feathers that are irrelevant to the paragraph's discussion of the pyramid's acoustic properties.

Step-by-Step Solution

1
Identify the main topic and focus of the paragraph.
The paragraph discusses the acoustic echo at El Castillo pyramid that mimics a quetzal chirp, and the debate over whether this effect was intentional or accidental.
Establishing the paragraph's primary topic is necessary to evaluate if the sentence in question supports or deviates from this focus.
2
Analyze the content and purpose of Sentence 4.
Sentence 4 states that the quetzal was valued for its feathers, which were used to make elaborate headdresses for royalty.
Analyzing the specific details of the sentence helps determine if it contributes to the discussion of acoustics or introduces irrelevant information.
3
Evaluate the deletion decision based on the relevance of the sentence.
Because details about royal headdresses do not relate to the acoustic echo or architectural engineering of the pyramid, the sentence should be deleted.
Removing irrelevant information maintains the unity and cohesion of the paragraph, leading to the correct choice.

Key Concept

Sentence Addition and Deletion Decisions
Estimated Time:1m 30s
Question 153Question

Paragraph 1

In the early nineteenth century, the proposal to build a 363-mile canal connecting the Hudson River to Lake Erie was widely mocked as an impossibility. Critics dubbed the project "Clinton's Folly," mocking New York Governor DeWitt Clinton's ambitious plan to cut through dense forests, swampy wilderness, and solid rock. Skeptics argued that the young nation lacked the engineering expertise and financial resources to complete such a monumental undertaking.

Paragraph 2

[1] _________ The canal reduced shipping costs by up to ninety percent and turned New York City into the nation's premier commercial port. Towns along the canal route grew into bustling cities almost overnight. The success of the project sparked a nationwide canal-building boom, proving that the daring engineering feat was not a folly at all, but a vital artery for a growing nation.

Which choice provides the most effective transition from the preceding paragraph to the paragraph that follows?

Show answer & explanation

Answer: Once the canal opened in 1825, however, the doubts quickly evaporated.

Answer

Once the canal opened in 1825, however, the doubts quickly evaporated.
The correct choice, which begins 'Once the canal opened...', successfully bridges the skepticism described in the first paragraph with the economic success described in the second paragraph. The transition word 'however' signals a shift from the past doubts to the realization of success when the canal opened.

Step-by-Step Solution

1
Analyze the relationship between the two paragraphs.
The first paragraph discusses skepticism and doubts about the building of the Erie Canal, while the second paragraph describes its immense success and economic benefits.
An effective paragraph transition must connect the primary ideas of both paragraphs, indicating a shift from doubt to success.
2
Evaluate the choices for logical flow and cohesion.
The option beginning with 'Once the canal opened...' uses the contrast word 'however' to bridge the doubts of the first paragraph with the success of the second.
This establishes a clear, logical link between the two paragraphs.
3
Check for grammatical errors in the remaining options.
The option with 'it immediately changed' has a comma splice, and the option with 'will transform' has an incorrect tense shift.
ACT questions require transitions to be both rhetorically effective and grammatically correct.

Key Concept

Paragraph-Level Transitions
Estimated Time:1m 0s
Question 154Question

The writer is considering deleting the following sentence from the passage:

'Monarch butterflies lay their eggs on milkweed plants because they are the only food source for the caterpillars.'

If the passage focuses on the migratory patterns of monarch butterflies, should the writer make this deletion?

Show answer & explanation

Answer: Yes, because the sentence interrupts the explanation of the migratory journey with irrelevant information about the butterfly's reproductive cycle and larval diet.

Answer

Yes, because the sentence interrupts the explanation of the migratory journey with irrelevant information about the butterfly's reproductive cycle and larval diet.
The correct option is the one stating that the sentence should be deleted because it interrupts the focus of the paragraph. The paragraph focuses on the details of the monarch butterfly's migratory journey, while the sentence in question shifts the topic to reproduction and larval diet, which is irrelevant to migration.

Step-by-Step Solution

1
Analyze the main focus of the paragraph.
The paragraph focuses on the migration of monarch butterflies, detailing their journey south to Mexico, the length of the trip, and the multiple generations involved.
Understanding the paragraph's topic is necessary to determine if a sentence is relevant or off-topic.
2
Evaluate the function of the proposed sentence.
The sentence introduces facts about egg-laying on milkweed and caterpillar food sources.
Identifying what the sentence contributes allows us to judge if it supports the main topic.
3
Compare the sentence's function with the paragraph's focus to decide on deletion and find the correct justification.
Since egg-laying and caterpillar food do not relate to the flight path or migration journey, the sentence is irrelevant and interrupts the narrative flow. It should be deleted.
This confirms that deletion is appropriate and aligns with the explanation that the sentence interrupts the focus.

Key Concept

Evaluating the relevance of sentences to maintain paragraph unity and cohesion.
Question 155Question

Read the passage and answer the question that follows.

The thorny devil, a lizard native to the Australian outback, can absorb water through its skin using a network of microscopic grooves between its scales. Additionally, this moisture is transported directly to the lizard's mouth by capillary action, allowing the creature to drink simply by standing on damp sand.

Which choice provides the most logical transition from the first sentence to the second sentence?

Show answer & explanation

Answer: Through this process,

Answer

Through this process,
The correct answer is 'Through this process,' because the second sentence explains the biological mechanism of capillary action by which the moisture absorbed through the lizard's skin (mentioned in the first sentence) travels to its mouth. This phrase accurately establishes that the second sentence details the operational mechanism of the process described in the first sentence.

Step-by-Step Solution

1
Analyze the relationship between the two sentences.
The first sentence describes a physical adaptation (microscopic grooves in the skin that absorb water). The second sentence explains the mechanics of how that absorbed water travels to the mouth (capillary action).
Understanding the logic linking the ideas is necessary to select the correct transition.
2
Determine the logical connection.
The second sentence is not a separate, additional adaptation, nor does it contrast with or compare to the first. Rather, it describes the mechanism by which the process introduced in the first sentence is completed.
Identifying the correct relationship allows us to eliminate incorrect categories of transitions.
3
Evaluate the options.
The option containing 'Through this process' correctly connects the physical mechanism to the result of the water absorption.
Selecting the option that matches the identified logical connection yields the correct answer.

Key Concept

Determining logical relationships between sentences to select appropriate transition words.
Estimated Time:1m 0s
Question 156Question

The following paragraph is from an essay about the history of technology.

[1] In 1948, Bernard Silver, a graduate student at Drexel Institute of Technology, overheard a supermarket executive asking a dean to develop a system to automatically capture product information at checkout. [2] Silver mentioned this challenge to his friend Norman Joseph Woodland, who became obsessed with the problem. [3] Woodland's initial idea was to use ink that glowed under ultraviolet light. [4] He then realized that a pattern of thin and thick lines, inspired by Morse code, could represent numbers.

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

"This ultraviolet ink, however, proved to be both unstable and expensive, forcing them to abandon the concept."

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

Show answer & explanation

Answer: after Sentence 3

Answer

after Sentence 3
The correct answer is the option that places the sentence after Sentence 3. Sentence 3 introduces the idea of using ultraviolet ink. The target sentence begins with 'This ultraviolet ink,' which requires an immediate antecedent to make sense. Placing the target sentence after Sentence 3 logically explains why the first idea failed before moving on to the second idea (Morse code lines) in Sentence 4.

Step-by-Step Solution

1
Identify the key transition and referring terms in the sentence to be placed.
The target sentence begins with the phrase 'This ultraviolet ink,' which indicates it must immediately follow a sentence that introduces the ultraviolet ink.
Establishing clear pronoun-antecedent relationships is essential for logical paragraph cohesion.
2
Scan the paragraph to find where the ultraviolet ink is first mentioned.
Sentence 3 contains the first and only mention of 'ink that glowed under ultraviolet light' in the original paragraph.
This establishes the necessary context for the pronoun phrase in the target sentence.
3
Evaluate the chronological and logical flow of the entire paragraph with the new sentence inserted.
Placing the sentence after Sentence 3 completes the thought about the initial idea's failure before Sentence 4 introduces the subsequent idea of using line patterns.
This sequence preserves the step-by-step narrative of the invention process.

Key Concept

Sentence Reordering and Placement
Estimated Time:1m 0s
Question 157Question

The writer wants to organize the sentences below to logically trace the cause-and-effect sequence of the trophic cascade in Yellowstone National Park following the reintroduction of wolves. Arrange the sentences in the most logical order.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The most logical order is: first, the sentence introducing the reintroduction of gray wolves; second, the sentence describing how elk altered their behavior to avoid the wolves; third, the sentence detailing the recovery of trees resulting from this behavioral shift; and fourth, the sentence explaining how the thriving vegetation attracted songbirds and beavers.
The correct order follows a clear chronological and logical cause-and-effect sequence: the reintroduction of wolves (the cause) leads to a shift in elk behavior (first effect), which allows the overgrazed vegetation to recover (second effect), which ultimately attracts songbirds and beavers to the ecosystem (third effect). Transition words and demonstrative adjectives ('these newly active predators', 'This behavioral shift', and 'Consequently') perfectly link each sentence to the one preceding it.

Step-by-Step Solution

1
Identify the introductory sentence.
The sentence about the 1995 reintroduction of gray wolves establishes the baseline event.
It introduces the topic of the passage (wolves in Yellowstone) without relying on preceding context or pronouns.
2
Find the sentence that directly follows the introduction by matching key terms.
The sentence starting with 'To avoid these newly active predators' must follow.
The phrase 'these newly active predators' directly refers to the 'gray wolves' introduced in the first sentence, showing the immediate behavioral reaction of the elk.
3
Determine the next link in the cause-and-effect chain.
The sentence starting with 'This behavioral shift' must follow the elk behavior sentence.
The phrase 'This behavioral shift' refers directly to the elk avoiding open valleys, and it introduces the regeneration of vegetation as the result.
4
Identify the final concluding sentence.
The sentence starting with 'Consequently, the thriving streamside vegetation' is the final sentence.
The transition 'Consequently' and the reference to 'thriving streamside vegetation' build directly upon the vegetation regeneration described in the third sentence, completing the logical cascade.

Key Concept

Fulfilling Specific Rhetorical and Writing Goals
Question 158Question

Passage:

Monarch butterflies migrate thousands of miles south to Mexico every autumn. [2] <underline>Consequently</underline>, they do not possess a map or GPS; they must rely on environmental cues like temperature and daylight to navigate the long journey.

Which choice most effectively transitions from the first sentence to the second sentence?

Show answer & explanation

Answer: However,

Answer

The transition 'However,' is the correct choice because it establishes a contrast between the butterflies' long-distance migration and their lack of navigation tools.
The transition 'However,' is correct because it highlights the contrast between the butterflies' ability to travel thousands of miles and their lack of typical navigational instruments.

Step-by-Step Solution

1
Analyze the relationship between the two sentences.
The first sentence describes an impressive long-distance migration, while the second sentence describes the lack of maps or GPS. This relationship is one of contrast.
Choosing the correct transition requires identifying the logical relationship between the adjacent ideas.
2
Evaluate the transition word options to find the one that shows contrast.
The words 'Consequently' (cause-effect), 'For instance' (illustration), and 'In addition' (addition) do not fit. Only 'However' signals contrast.
Eliminating incorrect logical relationships leaves the only logically sound choice.

Key Concept

Sentence-level transitions must accurately reflect the logical connection—such as contrast, cause-and-effect, addition, or illustration—between the sentences they join.
Estimated Time:45s
Question 159Question

The following paragraph contains numbered sentences.

[1] In 1998, a medieval prayer book known as the Archimedes Palimpsest was purchased at auction, opening a window into lost ancient Greek mathematics. [2] Centuries earlier, in the thirteenth century, scribes had scraped away the original text of several treatises by Archimedes to reuse the valuable parchment for religious texts. [3] Modern conservationists, however, faced the daunting task of reading the erased, underlying writing without damaging the fragile leaves. [4] By illuminating the parchment under different wavelengths of light, scientists captured a series of high-resolution digital photographs. [5] Computer algorithms then processed these digital images, enhancing the contrast between the two overlapping layers of writing.

The writer is considering adding the following sentence to the paragraph:

'This technique, known as multispectral imaging, allowed them to document the erased text hidden beneath the medieval ink.'

To make the paragraph flow in the most logical order, where should the writer place this sentence?

Show answer & explanation

Answer: After Sentence 4

Answer

After Sentence 4
The correct option is placing the sentence after Sentence 4. Sentence 4 describes a process of illuminating the parchment under different wavelengths of light to capture digital photographs. The new sentence begins with the phrase 'This technique,' which logically refers back to this illumination process. Furthermore, placing the sentence here ensures that Sentence 5, which starts with 'these digital images,' has a clear and immediate connection to the digital photography and imaging described in Sentence 4 and the new sentence.

Step-by-Step Solution

1
Identify the logical clues, such as pronouns, transitions, or temporal markers, in the sentence to be placed.
The sentence to be placed contains the phrase 'This technique,' indicating it must immediately follow the description of a specific method or technique.
Demonstrative pronouns like 'this' require a clear and immediate antecedent in the preceding text to maintain coherence.
2
Scan the paragraph to find where a specific technique or method is described.
Sentence 4 describes the method of 'illuminating the parchment under different wavelengths of light' to capture digital photographs.
This illumination process is the only method in the paragraph that can logically be referred to as 'This technique.'
3
Verify the connection between the placed sentence and the sentence that follows it.
If the new sentence is placed after Sentence 4, Sentence 5 ('Computer algorithms then processed these digital images...') follows naturally because the new sentence describes documenting the text using 'imaging' to produce those digital files.
Checking the flow both before and after the insertion point ensures the paragraph's overall unity is maintained.

Key Concept

Sentence Reordering and Placement
Question 160Question

The following paragraphs are from a draft of an essay about the discovery of pulsars.

[1]
In the summer of 1967, Jocelyn Bell Burnell, a postgraduate student at Cambridge University, was analyzing miles of paper chart recordings from a newly constructed radio telescope. The telescope had been designed to study quasars, but Bell Burnell was looking for anything unusual in the massive amounts of data generated.

[2]
To investigate further, she used a high-speed recorder that could capture detail on a much shorter time scale. This faster recording revealed that the signals were actually incredibly regular pulses, occurring every 1.33 seconds.

[3]
Initially, some team members wondered if the signals were artificial transmissions from an extraterrestrial civilization, jokingly naming the source "LGM-1" for "Little Green Men." However, when Bell Burnell located a second, similarly pulsating source in a completely different part of the sky, it became clear that this was a natural, albeit entirely new, astronomical phenomenon: a pulsar.

[4]
While scanning the charts, she noticed a strange "scruff" of signals that did not look like the random interference typical of radio noise. The mysterious signals recurred at the exact same location in the sky, suggesting they originated from deep space rather than a terrestrial transmitter.

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

Show answer & explanation

Answer: after Paragraph 1

Answer

Paragraph 4 should be placed after Paragraph 1.
The correct placement is after Paragraph 1. Paragraph 1 introduces the context of analyzing paper chart recordings from a radio telescope. Paragraph 4 details the initial observation of a strange signal while scanning these charts. Placing Paragraph 4 here provides the necessary context for Paragraph 2, which opens with the transition 'To investigate further' and describes the use of a high-speed recorder to identify the signals as regular pulses. Paragraph 3 then logical follows by describing the team's reaction to 'the signals' identified in Paragraph 2.

Step-by-Step Solution

1
Analyze the relationship between Paragraph 1 and Paragraph 4.
Paragraph 1 introduces Jocelyn Bell Burnell's task of analyzing 'miles of paper chart recordings.' Paragraph 4 begins with 'While scanning the charts, she noticed...', establishing a direct link and placing Paragraph 4 immediately after Paragraph 1.
This establishes the antecedent for the noun phrase 'the charts' in Paragraph 4.
2
Examine the connection between Paragraph 4 and Paragraph 2.
Paragraph 4 concludes with the discovery of a 'strange "scruff" of signals.' Paragraph 2 begins with 'To investigate further, she used a high-speed recorder...'.
The transition 'To investigate further' requires a prior discovery to investigate, which is the 'scruff of signals' introduced in Paragraph 4.
3
Verify the coherence between Paragraph 2 and Paragraph 3.
Paragraph 2 ends by revealing that the signals are 'incredibly regular pulses.' Paragraph 3 begins with 'Initially, some team members wondered if the signals were artificial...', referring directly to the pulses identified in Paragraph 2.
This confirms that the natural and logical sequence of the essay must be 1 -> 4 -> 2 -> 3.

Key Concept

Paragraph Reordering and Placement
Estimated Time:1m 30s
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