TOEFL Sentence Simplification Questions Questions and Answers

Question 1

Which of the following sentences best expresses the essential information in the sentence below?

The unprecedented proliferation of microplastics in marine ecosystems, a direct consequence of the fragmentation of larger plastic debris and the widespread use of microbeads in consumer products, poses a significant threat to aquatic organisms by entering the food chain at the lowest trophic levels.

Accepted Answer

Microplastics, which result from the breakdown of larger plastics and the use of microbeads, endanger marine life by contaminating the food chain.

Answer

The use of microbeads in consumer products is the primary reason for the significant threat that microplastics pose to aquatic organisms.

Answer

Because microplastics have entered the food chain at the lowest trophic levels, they are now proliferating in marine ecosystems.

Answer

Aquatic organisms are threatened by microplastics, which are mainly created when larger plastic debris fragments in the ocean.

Question 2

Which of the following sentences best expresses the essential information in the sentence below?

Despite the considerable initial investment required for installation and the intermittent nature of wind and solar power, renewable energy sources are increasingly viewed as a viable long-term solution to global energy demands due to their negligible carbon emissions and decreasing production costs.

Accepted Answer

Although renewable energy has drawbacks like high upfront costs and unreliability, it is becoming a more practical solution because it produces almost no carbon and is getting cheaper.

Answer

The decreasing production costs and low carbon emissions of renewable energy make their high initial investment worthwhile.

Answer

Renewable energy is not a perfect solution for meeting global energy demands because of its high installation costs and unreliable nature.

Answer

The world is demanding more renewable energy sources like wind and solar power in order to reduce carbon emissions and production costs.

Question 3

Which of the following sentences best expresses the essential information in the sentence below?

The process of nitrogen fixation, essential for making nitrogen available to plants, involves the conversion of atmospheric nitrogen gas (N2), which is largely inert, into ammonia (NH3) and other related nitrogenous compounds, a transformation primarily carried out by specialized soil microorganisms.

Accepted Answer

In a process crucial for plants, specialized soil microorganisms convert unusable nitrogen gas from the atmosphere into usable forms like ammonia.

Answer

Specialized soil microorganisms are essential for plant life because they produce inert atmospheric nitrogen gas for plants to use.

Answer

Plants require nitrogen, which they get from atmospheric nitrogen gas after it is converted by various compounds in the soil.

Answer

The conversion of ammonia into atmospheric nitrogen gas is an essential process for plants that is carried out by soil microorganisms.

Question 4

Which of the following sentences best expresses the essential information in the sentence below?

Quantum entanglement is a perplexing physical phenomenon in which two or more quantum particles become linked in such a way that their fates are intertwined, meaning that measuring a property of one particle, such as its spin, instantaneously influences the corresponding property of the other particle, regardless of the distance separating them.

Accepted Answer

Quantum entanglement is a phenomenon where linked particles instantly affect each other's properties when measured, even when separated by great distances.

Answer

The distance separating two particles determines how their properties will be linked through the perplexing phenomenon of quantum entanglement.

Answer

In quantum entanglement, two particles are linked so that their various properties, such as spin, can be measured at the same time.

Answer

Physicists can measure the properties of two quantum particles to understand how their fates become intertwined over great distances.

Question 5

Which of the following sentences best expresses the essential information in the sentence below?

Unless governments implement substantial and coordinated policy changes aimed at curbing greenhouse gas emissions, the scientific consensus is that global average temperatures will continue to rise, leading to more frequent extreme weather events and irreversible damage to polar ice caps.

Accepted Answer

Scientists agree that without significant government action to reduce emissions, rising temperatures will cause more extreme weather and permanent damage to polar ice.

Answer

Government policies aimed at curbing emissions have unfortunately led to rising global temperatures and extreme weather events.

Answer

According to scientists, the first consequence of government inaction on emissions will be irreversible damage to the polar ice caps.

Answer

The scientific consensus on climate change requires that governments coordinate policies to deal with rising temperatures and extreme weather.

Question 6

Which of the following sentences best expresses the essential information in the sentence below?

The concept of 'niche construction,' a key idea in evolutionary biology, posits that organisms actively modify their own environments, thereby altering the selection pressures they and other species face; a classic example is the beaver, which builds dams that transform entire ecosystems.

Accepted Answer

Niche construction is an evolutionary concept where organisms, such as beavers building dams, actively change their surroundings and consequently affect evolutionary pressures.

Answer

Beavers are a classic example of an organism that can alter selection pressures within their ecosystem by building dams and transforming it.

Answer

In evolutionary biology, organisms like the beaver must face different selection pressures because their environments are actively modified.

Answer

The beaver's construction of dams is an important process that transforms ecosystems and is a key idea in evolutionary biology.