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Just about everything in the icy waters off the coast of Antarctica is in the same state—frozen. Yet one type of fish, called a notothenioid, remarkably does not freeze in the frigid environment. In a recent study, scientists were able to better understand a genetic alteration in the fish. As it turns out, antarctic notothenioids produce a substance that acts as antifreeze. Antifreeze is a term familiar to car owners. It is a substance that keeps the water inside an automobile engine from freezing. Notothenioids manufacture their own "antifreeze proteins." These proteins lock on to ice crystals in their blood.
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The notothenioid _________.
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A adapted
B departed
C enlarged
D wavered
A) adapted
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When British environmentalist Roz Savage arrived in Papua, New Guinea, on June 4, 2010, she was greeted like a rock star. Thousands of people turned out to welcome her. And for good reason: Savage had just become the first woman to row alone across the Pacific Ocean. Savage estimates that she made 2.5 million oar strokes during her journey. The trip was broken up into three different legs. First, she set off from San Francisco on May 25, 2008, and rowed 2,900 miles (4,667 kilometers) to Hawaii. Then, on May 22, 2009, Savage left Hawaii and rowed 3,158 miles (5,082 kilometers). She reached the tiny South Pacific nation of Kiribati in September 2009. For the last leg, she left Kiribati on April 19, 2010.
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Savage was _________.
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A courageous
B gracious
C alarmed
D persuasive
A) courageous
A) adapted
To answer the question, we need to understand the information provided in the passage. According to the passage, the notothenioid fish in Antarctica has a genetic alteration that allows it to not freeze in the frigid environment. The passage also states that these fish produce a substance called "antifreeze proteins" that lock onto ice crystals in their blood.
From this information, we can determine that the correct answer is:
A adapted
The notothenioid fish in Antarctica has adapted to the freezing environment by producing antifreeze proteins.