All practice questions

During nocturnal hikes in the damp forests of southern Brazil, travelers often witness a glowing green light emanating from the forest floor. This eerie glow is produced by *Neonothopanus gardneri*, a species of bioluminescent mushroom. The reason why these mushrooms glow in the dark is due to the fact that they contain a chemical compound called luciferin, which reacts with oxygen to attract spore-spreading insects.

Which choice is the most concise and grammatically correct version of the underlined portion?

The writer is considering deleting the underlined sentence from the following paragraph:

During a winter visit to New York City in 1903, Mary Anderson noticed that motormen on streetcars had to keep their window panes open, or even stop the car to clear falling sleet from the glass. Frustrated by this hazard and delay, she began sketching a design for a mechanical squeegee. Later that year, she was granted a patent for her window cleaning device, which was controlled by a lever inside the vehicle. Automobile manufacturers initially rejected her design, believing it would distract drivers. Underlined: In the early twentieth century, streetcar fares in New York City were typically five cents. Consequently, Anderson never profited from her patent, which expired before the automotive industry fully adopted her invention.

Should the writer delete the underlined sentence?

Originally built as a fortress in the late twelfth century, the Louvre Palace underwent numerous renovations. It was transformed into a museum, and this was done for the purpose of showing art to the public in 1793.

Which of the following is the best replacement for the underlined portion?

Geothermal geysers, such as Yellowstone's Old Faithful, erupt on highly predictable schedules due to the buildup of underground pressure. The geothermal water, which is heated to a high temperature by hot magma beneath the Earth's surface, boils and eventually forces its way upward.

Which of the following options represents the most effective and grammatically correct replacement for the underlined portion?

Passage Excerpt:

In the late 1890s, the Paris Metropolitan Railway Company sought to build entrances for its new underground transit system. The company selected architect Hector Guimard, whose designs reflected the emerging Art Nouveau movement. Rather than creating imposing stone structures, Guimard chose to construct delicate, organic-looking pavilions made of cast iron and glass. [1] These structures, characterized by sinuous lines and leaf-like glass awnings, integrated art into the daily commute of ordinary citizens.

Question:

Given that all the choices are true, which choice most effectively adds a detail at Point [1] that highlights the practical function of the glass awnings in shielding commuters from the weather?

To transport clean water across long distances, Roman engineers constructed aqueducts, which were vast bridge-like structures that carried water over valleys. Because they relied on gravity alone as the sole force of movement, the conduits had to decline at a precise, consistent slope to prevent stagnation.

Which of the following choices best replaces the underlined portion of the sentence to construct a clear, grammatically correct statement without redundant phrasing?

Passage Excerpt:
Deep inside a sandstone mountain on the Norwegian island of Spitsbergen, the Svalbard Global Seed Vault serves as a secure backup facility for the world's crop diversity. Designed to withstand natural and man-made disasters, the vault is located in an area with low tectonic activity and surrounded by permafrost. Since its opening in 2008, the facility has accumulated over one million unique seed samples from almost every country on Earth, ensuring that agricultural history is preserved.

Given that all the choices are true, which choice most clearly emphasizes the remote, arctic environment of the vault's location?

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

The paleontologists examined the apex predator's fossilized jaw, it was uniquely adapted for the sole and exclusive purpose of crushing dense bone.

Which of the following choices, if used to replace the underlined portion, most effectively eliminates the redundancy in the sentence?

Deep-sea hydrothermal vents support unique ecosystems that thrive in complete darkness, miles below the ocean's surface. These ecosystems rely on a process that is entirely independent of sunlight: chemosynthetic bacteria convert toxic chemical compounds into organic energy to form the foundation of the food web.

Which of the following alternatives to the underlined portion is grammatically correct?

In the mid-nineteenth century, Samuel Morse developed the telegraph, which revolutionized long-distance communication. Before this invention, messages took days or even weeks to travel across the country by horse. With the introduction of the telegraph, which was a device that allowed for messages to be sent rapidly, communication became nearly instantaneous. This breakthrough transformed commerce, journalism, and personal correspondence.

Which of the following is the most effective replacement for the underlined segment?

The following is an excerpt from a passage about the social impact of the safety bicycle:

In the late nineteenth century, the introduction of the safety bicycle completely transformed society, offering a level of personal mobility previously unimaginable to the general public. Unlike its predecessor, the high-wheeler (or 'ordinary' bicycle), which featured a massive front wheel that made it notoriously difficult and dangerous to ride, the safety bicycle featured two wheels of equal size and a chain-driven rear wheel. This design innovation allowed riders to easily mount the vehicle and touch their feet to the ground. Consequently, it democratized cycling, transitioning it from a hazardous hobby for daring young men to a practical mode of transportation for people of all genders and social classes.

[1] Because it provided a reliable, independent way to travel without chaperones, it allowed women to leave the domestic sphere and challenge traditional expectations of behavior and dress. Renowned women's rights advocate Susan B. Anthony even remarked that bicycling had 'done more to emancipate women than anything else in the world.'

Which of the following sentences, if added at point [1], would best establish the main topic of the second paragraph?

Consider the following sentence from an article about space exploration:

To analyze the composition of the distant star, the astrophysicist focused on three key spectral lines; those representing hydrogen, helium, and sodium.

Which of the following is the most grammatically correct choice for the underlined portion of the sentence?

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

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

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

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

Passage Segment:

In 1977, oceanographers aboard the research submersible *Alvin* made a startling discovery on the Pacific ocean floor: hydrothermal vents spewing mineral-rich water into the pitch-black depths. Rather than finding a barren wasteland, the scientists observed a thriving ecosystem teeming with giant tube worms and ghost-white crabs. This discovery revolutionized our understanding of biology, demonstrating that entire communities could flourish without a single ray of sunlight. [1] **Furthermore, the *Alvin* submersible had been upgraded recently with titanium hulls to withstand extreme pressure.**

Instead of utilizing photosynthesis, the organisms surrounding these vents rely on chemosynthesis, a process where bacteria convert dissolved hydrogen sulfide gas into organic matter. This geothermal energy pathway suggested that life on Earth might have originated in the deep sea rather than in shallow, sunlit waters.

Question:

Which choice most effectively concludes the first paragraph and provides a transition to the second paragraph?

Engineers studying ancient Roman architecture have long marveled at the durability of its concrete, which has survived for millennia. Recent chemical analyses reveal that the secret lies in 'lime clasts'—small, white mineral chunks that were once considered mere mixing defects. These tiny, white chunks of lime, which are small in size, actually allow the concrete to self-heal cracks when exposed to rainwater.

Which choice most concisely and clearly expresses the underlined portion?

Ancient Greek architects constructed theaters with a semicircular design; this intentional shape, which was planned on purpose, allowed sound waves to travel efficiently to the top rows.

Which choice most effectively eliminates the redundancy in the underlined portion of the sentence while maintaining correct grammar and punctuation?

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

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

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

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