Transitions: Cause and Effect

Plants in a forest are connected by underground networks of mycorrhizal fungi, which allow them to share nutrients and water. When a tree is attacked by pests, it transmits warning chemical signals through these fungal pathways to neighboring trees. ________, the receiving trees quickly synthesize defensive chemicals to protect themselves before the pests arrive.

Which choice completes the passage with the most logical transition?

In dendrochronology, scientists use tree-ring datasets to calibrate radiocarbon dating measurements, establishing a precise timeline for historical artifacts. Because carbon-14 levels in the atmosphere have fluctuated historically rather than remaining constant, raw radiocarbon ages cannot be converted directly into calendar years. _______ archeologists must apply calibration curves to adjust these raw dates, aligning them with the real-time calendar record.

Which transition word or phrase most logically completes the blank in the passage?

Which word or phrase most logically completes the passage?

Which word or phrase best indicates the logical relationship between the sentences and completes the blank?

Complete the passage with the transition word or phrase that most logically connects the ideas.

In the late nineteenth century, the introduction of commercial refrigeration systems transformed the global food trade. Perishable goods like meat and dairy could suddenly be transported across vast oceans without spoiling. ________, countries with large agricultural sectors, such as Argentina and Uruguay, experienced a massive economic boom as they became major exporters of fresh beef to European markets.

Which transition word or phrase most logically completes the passage?

In behavioral economics, loss aversion refers to the tendency of individuals to prefer avoiding losses over acquiring equivalent gains. This psychological bias makes the pain of losing a sum of money feel twice as intense as the joy of acquiring it. ________, investors frequently hold onto declining stocks for too long in the hope of breaking even, rather than selling them to prevent further losses.

Which choice completes the text with the most logical transition?

In many languages, grammatical gender systems simplify over time due to contact with other languages whose speakers do not share those systems. When adult learners acquire a second language, they often struggle with complex inflectional morphology, omitting gender markers in speech. Languages spoken in highly multilingual regions, ________, show a marked reduction in grammatical gender complexity compared to their isolated relatives.

Which choice completes the passage with the most logical transition?

What transition word or phrase best completes the blank to establish the correct relationship between the sentences?

Complete the passage with the transition word or phrase that most logically connects the ideas.

During the late nineteenth century, physicists hypothesized the existence of the 'luminiferous ether' to explain how light waves could propagate through otherwise empty space. The famous Michelson-Morley experiment of 1887, however, detected absolutely no difference in the speed of light regardless of the Earth's motion. ______ scientists eventually abandoned the ether hypothesis, prompting a major paradigm shift that culminated in Albert Einstein's theory of special relativity.

Which choice completes the passage with the most logical transition?

The surface of Venus is permanently shrouded by a dense atmosphere composed primarily of carbon dioxide and thick clouds of sulfuric acid, which efficiently trap incoming solar radiation. _______, the planet experiences a runaway greenhouse effect that elevates surface temperatures to a scorching $460^\circ\text{C}$—hot enough to melt lead—making it the hottest planet in our solar system despite not being the closest to the Sun.

Which choice completes the text with the most logical transition?

Earth’s magnetosphere deflects most of the solar wind, shielding the atmosphere from erosion by charged particles. However, during periods of intense solar activity, magnetic reconnection can temporarily breach this shield, allowing high-energy plasma to enter the upper atmosphere. ____________, geomagnetically induced currents can surge through power grids on the surface, causing widespread electrical failures.

Which choice completes the passage with the most logical transition?

The following passage is about the socioeconomic effects of the Black Death in medieval Europe. Complete the passage by entering the transition word or phrase that most logically connects the ideas. Which transition word or phrase best completes the passage?

During the mid-twentieth century, urban planner Jane Jacobs argued that active street life promotes neighborhood safety by ensuring natural surveillance, or 'eyes on the street.' Jacobs observed that streets with mixed-use zoning attract continuous pedestrian traffic throughout the day. These busy public spaces, ________, experience lower rates of crime, as the persistent presence of observers deters illicit behavior.

Which choice completes the passage with the most logical transition?

Review the passage below. Identify the transition word or phrase that should be inserted in the blank to establish the correct logical relationship.

Mycorrhizal fungi form symbiotic relationships with plant roots, helping them absorb nutrients like phosphorus and nitrogen more efficiently. In soils degraded by mining or intensive farming, these fungi are often absent, preventing native vegetation from re-establishing. Reintroducing mycorrhizal spores to depleted soils can restore the vital nutrient pathways required for plant growth. ________, local plant diversity often recovers rapidly, allowing the ecosystem to rebuild its structural complexity.

Which choice completes the text with the most logical transition?

Read the passage about the ecological effects of gray wolves. Which word or phrase logically completes the text by establishing a cause-and-effect connection?

Unlike many underground predators that rely on visual cues, the star-nosed mole hunts in pitch-black tunnels by using its touch-sensitive nasal tentacles to detect prey. ______ it can identify and consume small insects in under a quarter of a second, making it one of the fastest foraging mammals known to science.

Which choice completes the passage with the most logical transition?

To protect their nests from predators, some species of tropical wasps construct nests with narrow, complex entrances that deter larger invaders. While these architectural barriers are highly effective at keeping out predators, they also restrict the airflow inside the nest, causing temperature and humidity levels to rise. The wasps, _______, must actively fan their wings to ventilate the chambers and prevent their larvae from overheating.

Which choice completes the passage with the most logical transition?