Expression of Ideas

While planning a presentation on landmark astronomical discoveries, a student takes the following notes:
* In 1967, astrophysicist Jocelyn Bell Burnell detected a regular, repeating radio signal from space.
* The signal pulsed precisely once every 1.33 seconds.
* Burnell and her advisor, Antony Hewish, nicknamed the source "LGM-1" (for "Little Green Men").
* They later determined the signal was emitted by a rapidly spinning neutron star.
* This type of star is now known as a pulsar, and its discovery proved the existence of neutron stars.

The student wants to summarize the discovery of pulsars. Which choice most effectively uses information from the given notes to accomplish this goal?

While researching the Greenland shark, a student takes the following notes:
* The Greenland shark (*Somniosus microcephalus*) is a large deep-water species native to the North Atlantic.
* In a 2016 study, marine biologist Julius Nielsen and his team used radiocarbon dating on the eye lenses of 28 female Greenland sharks to estimate their ages.
* The researchers estimated the oldest shark in the study to be approximately 392 years old.
* The study concluded that the Greenland shark is the longest-lived vertebrate species known on Earth.
* Greenland sharks grow very slowly, at a rate of about one centimeter per year, and do not reach sexual maturity until they are about 150 years old.

The student wants to summarize the 2016 study and its primary finding. Which choice most effectively uses information from the given notes to accomplish this goal?

During volcanic eruptions, vast plumes of iron-rich ash are carried by winds and deposited into the nutrient-deficient surface waters of the subarctic Pacific Ocean. ______ marine phytoplankton, whose growth is typically restricted by the scarcity of dissolved iron in these high-nutrient, low-chlorophyll regions, undergo rapid multiplication and generate massive, satellite-visible algal blooms that temporarily alter the local marine ecosystem.

Which choice completes the text with the most logical transition?

For decades, historical linguists assumed that the Etruscan language, which was spoken in ancient Italy, was entirely isolated and shared no common origins with other Mediterranean tongues. _________ recent structural analyses of ancient Aegean inscriptions have revealed striking morphological similarities between Etruscan and Lemnian, challenging the long-held isolation hypothesis.

Which choice completes the passage with the most logical transition?

While preparing a presentation on pre-Columbian engineering, a student takes the following notes:

* The Chimú Empire (1000–1470 CE) constructed the Chicama-Moche canal to direct water through the arid Peruvian desert.
* To prevent water from eroding the canal's earthen banks, Chimú engineers designed it with a precise, gentle slope averaging only 1 to 2 meters of drop per kilometer.
* Tectonic uplift later altered the region's topography, disrupting the canal's slope alignment.
* Due to these geological changes, water could no longer flow through the canal, and the project was abandoned before completion.

The student wants to support the claim that the canal's abandonment was caused by geological activity rather than poor engineering. Which choice most effectively uses information from the given notes to accomplish this goal?

While preparing a presentation on marine sciences, a student took the following notes:

* Sclerochronology is a scientific discipline that studies the physical and chemical variations in the accretionary hard tissues of organisms.
* These tissues include mollusk shells and coral skeletons.
* The field is considered the marine counterpart to dendrochronology (tree-ring dating).
* Researchers analyze periodic growth increments in these hard tissues to reconstruct past marine environments.
* The term was coined in 1974 by geologist Richard A. Dodge.

The student wants to provide a definition of sclerochronology. Which choice most effectively uses information from the given notes to accomplish this goal?

Planetary geologists studying the surface of Mars have identified features that suggest ancient liquid water once flowed there in large quantities. However, determining the precise duration and stability of these ancient water bodies remains a challenge. __________, the discovery of clay minerals and hydrated silica in Jezero Crater indicates that liquid water must have persisted for thousands, if not millions, of years, as these minerals require sustained aqueous alteration to form.

Which choice completes the text with the most logical transition?

Read the following passage. Which transition word or phrase logically completes the text to establish a cause-and-effect relationship?

Many architectural historians have long argued that the distinctive dome of the Florence Cathedral, designed by Filippo Brunelleschi, was inspired solely by classical Roman engineering techniques. ________, recent structural analyses have revealed that Brunelleschi incorporated advanced Byzantine masonry methods, such as the herringbone brick-laying pattern, which were not utilized in Roman vaults.

Which choice completes the passage with the most logical transition?

While preparing a presentation on Rongorongo, a script from Easter Island, a student takes the following notes:
* Rongorongo is a system of glyphs discovered on Easter Island in the 19th century.
* In 1958, linguist Thomas Barthel published a catalog of the glyphs, identifying 120 basic signs.
* Barthel's work established a standardized numbering system for the glyphs, facilitating modern analysis.
* Some researchers claim that Rongorongo developed independently without external influence.
* Despite decades of study, scholars have not yet reached a consensus on the meaning or translation of the glyphs.

The student wants to support the claim that Rongorongo remains undeciphered despite historical efforts to systematically organize the script. Which choice most effectively uses information from the given notes to accomplish this goal?

While preparing a presentation on early photography, a student took the following notes:

* The daguerreotype process, introduced in 1839, created a highly detailed image directly on a polished sheet of copper.
* Because each daguerreotype was unique, it could not be easily replicated or used to print multiple copies.
* The calotype process, patented in 1841, produced a paper negative from which multiple paper prints could be made.
* Although calotypes allowed for the mass production of prints, the resulting images were softer and lacked the fine detail of daguerreotypes.

The student wants to contrast the replication capability of the daguerreotype process with that of the calotype process. Which choice most effectively uses information from the given notes to accomplish this goal?

A writer took the following notes while researching deep-sea exploration vessels:
* The submersible *Deepsea Challenger* was designed by filmmaker James Cameron.
* In 2012, the vessel reached the bottom of the Mariana Trench.
* The hull of the vessel was constructed from a specialized syntactic foam.
* It reached a maximum depth of 10,908 meters during its historic dive.
* Marine biologist Dr. Sandra Myres analyzed the sediment samples collected during the mission.

The writer wants to write a sentence that emphasizes the material composition of the *Deepsea Challenger*'s hull. Complete the sentence by filling in the blank with the correct detail from the notes.

While preparing a talk on biological classification, a student took the following notes:

* Cladistics is an approach to biological classification.
* In cladistics, organisms are categorized based on their shared evolutionary ancestry.
* The approach groups organisms into clades, which consist of a common ancestor and all its descendants.
* It was developed in the 1950s by German entomologist Willi Hennig, who referred to it as phylogenetic systematics.
* Cladistics differs from phenetics, an approach that groups organisms based on overall physical similarity.

The student wants to provide a definition of cladistics. Which choice most effectively uses information from the given notes to accomplish this goal?

Geochemists analyzing speleothems—mineral deposits like stalagmites in limestone caves—can reconstruct historical precipitation patterns by measuring oxygen isotope ratios. ______ researchers can determine the severity of ancient droughts by analyzing the ratio of oxygen-18 to oxygen-16 preserved in successive calcite layers, as higher concentrations of the heavier isotope indicate periods of intense evaporation and low rainfall.

Which choice completes the passage with the most logical transition?

The notes below detail the discovery of the fossilized remains of a *Tyrannosaurus rex* named Sue:

* The fossil was discovered in August 1990 by paleontologist Sue Hendrickson.
* It was found in the Hell Creek Formation near Faith, South Dakota.
* The specimen is the most complete *Tyrannosaurus rex* skeleton ever found, with approximately 90% of the bones recovered.
* In 1997, the Field Museum of Natural History in Chicago purchased the fossil for $8.36 million.
* The skeleton has been on public display at the Field Museum since May 2000.

Which choice uses information from the notes to emphasize when and by whom the fossil was discovered?

Axolotls possess an extraordinary ability to regenerate complex body parts, leading scientists to long assume that their cellular mechanisms were entirely distinct from those of mammals. ______ genomic analyses have recently revealed that the key signaling pathways involved in axolotl limb regeneration are also present and active in mammalian genomes, though they remain dormant in humans.

Which choice completes the text with the most logical transition?

While researching the Amazonian language Pirahã, a student takes the following notes:
* Daniel Everett's 2005 study analyzed the grammar of Pirahã, an indigenous language of the Amazon Basin.
* Everett argued that Pirahã lacks recursion, which is the grammatical process of embedding phrases within other phrases.
* Generative linguistics theories, championed by Noam Chomsky, had long held that recursion is a universal feature of all human languages.
* Everett proposed that cultural values, rather than an innate universal grammar, limit the structural complexity of Pirahã.
* The study initiated a major debate over whether universal grammar exists or if language is primarily a culturally shaped tool.

The student wants to present a generalization about the significance of Everett’s study. Which choice most effectively uses information from the given notes to accomplish this goal?

While researching the decipherment of ancient scripts, a student takes the following notes:
* Linear B is an ancient script discovered in Crete in 1900.
* For decades, scholars believed that the script recorded a non-Greek Aegean language.
* In the 1940s, classicist Alice Kober identified patterns indicating that the underlying language was inflected.
* Building on Kober's structural analysis, Michael Ventris deciphered the script in 1952.
* The decipherment proved that Linear B represented Mycenaean Greek, rewriting the history of the Bronze Age Aegean.

The student wants to summarize the history and impact of the decipherment of Linear B. Which choice most effectively uses information from the given notes to accomplish this goal?

While preparing a presentation on climatology, a student took the following notes:
* Paleotempestology is an interdisciplinary field of study.
* It focuses on reconstructing the history of tropical cyclone activity, such as hurricanes, before the era of modern meteorological instruments.
* Scientists in this field analyze geological proxy records, such as overwash sand deposits found in coastal lake sediments.
* They also analyze historical records, such as ship logs, personal diaries, and meteorological documents.
* The term was coined in the late 20th century, gaining wider recognition in the 1990s.

The student wants to introduce paleotempestology to an audience unfamiliar with the term. Which choice most effectively uses information from the given notes to accomplish this goal?

In molecular biology, researchers have observed that octopuses frequently edit their own RNA to adapt to colder water temperatures, a process that allows them to customize protein function without altering their underlying DNA. ________, other cephalopods, such as squids and cuttlefish, utilize this same genetic mechanism to maintain nervous system activity in response to seasonal environmental shifts.

Which choice completes the passage with the most logical transition?