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2026年2月托福机经套卷(第2套)Read an Academic Passage5 道题

The Impact of Climate Change on Coral Reefs

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The Impact of Climate Change on Coral Reefs Coral reefs are among the most diverse and valuable ecosystems on Earth, providing habitat for countless marine species. However, climate change poses a severe threat to these vibrant underwater communities. Rising sea temperatures lead to coral bleaching, a phenomenon where corals lose their color and essential symbiotic algae, resulting in weakened corals that are more susceptible to disease. In addition to temperature changes, climate change contributes to ocean acidification through increased atmospheric CO2 levels. Ocean acidification reduces the availability of calcium carbonate, a crucial component of coral skeletons. As the acidity of seawater increases, corals struggle to maintain their structures, leading to diminished reef growth and stability. Efforts to mitigate these impacts include developing coral species that are more resilient to temperature fluctuations and acidification. Scientists are exploring selective breeding and genetic modification as potential solutions. Furthermore, initiatives to reduce CO2 emissions globally aim to alleviate the stress on coral reefs. The survival of coral reefs depends largely on addressing climate change comprehensively.
Question 1查看单题
What is coral bleaching?
AAn increase in coral growth
BAn effect of high temperatures that harms coral
CA method of coral reproduction
DA protective mechanism used by corals
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正确答案：B
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Question 2查看单题
What is the effect of ocean acidification on coral reefs?
AIt leads to temperature changes in the surrounding waters.
BIt can increase atmospheric CO2 levels, resulting in coral bleaching.
CIt reduces the availability of the calcium carbonate needed for coral structures.
DIt leads to more stability within existing reefs.
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正确答案：C
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Question 3查看单题
The word "mitigate"in the passage is closest in meaning to
Aresearch
Balleviate
Cmeasure
Dpredict
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正确答案：B
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Question 4查看单题
What is suggested in the passage about selective breeding and genetic modification?
AThey are the only solutions to coral bleaching.
BThey are potential methods to develop resilient coral species.
CThey are proven to reverse ocean acidification.
DThey help reduce CO2 emissions.
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正确答案：B
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Question 5查看单题
There are four locations █ in the passage that indicate where the following sentence could be added.
The absence of calcium carbonate also reduces the ability of corals to support diverse marine life and protect coastal ecosystems.
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