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  3. Some fish seem to be capable of adapting rapidly to climate change. In fact, they might even thrive in the warmer oceans of the

Some fish seem to be capable of adapting rapidly to climate change. In fact, they might even thrive in the warmer oceans of the

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问题     Some fish seem to be capable of adapting rapidly to climate change. In fact, they might even thrive in the warmer oceans of the future, growing bigger and healthier than they can at present-day temperatures. Evidence gathered over the past decade has suggested that climate change will force fish to migrate to cooler waters, or else face extinction. Signs of such migration have already even been seen. But recent studies have shown that some fish are able to adapt to warmer waters over a few generations.
    Earlier this month, Philip Munday of James Cook University, and his colleagues showed that one key tropical fish species did this by switching some of its genes on and off. Yet there are questions over the potential cost of such an adaptation. The fish’s ability to swim seems to be unimpaired but, as Munday noted: "Maybe we’ll see trade-offs with growth rates. There are no free lunches in this world. " However, for some fish at least, climate change may well carry the prospect of just such a free lunch.
    Work by Jennifer Donelson from the University of Technology in Sydney, Australia, suggests that when a certain species of reef-dwelling fish adapts to warmer waters, it grows bigger and is in better physical condition.
    In her laboratory, Donelson reared several groups of maroon clownfish or anemonefish, which live in coral reefs throughout the West Pacific. She kept one group at temperatures replicating present-day conditions on the Great Barrier Reef, from where the parents of the fish were collected. In addition, she kept another group at 1.51 warmer and a third group at 31 warmer, representing the ocean temperature rise expected by the end of the century.
    After a year of growing, the fish adapted to the warmer temperatures, upping their aerobic metabolism. And that enhancement seemed to bestow other benefits; those reared at temperatures 3℃ warmer grew 8 percent larger and 29 per cent heavier than fish reared at lower temperatures.
    Donelson says that it is hard to make predictions about how different species will cope with climate change. " But at least it won’t be all negative news for all species," she says.
    Warmer waters could be a good thing for fish that are able to adapt quickly enough, says Munday. But he notes that there could still be other costs of adaptation that were not revealed by this study. Donelson agrees, saying that she did not test the reproduction rates of the anemonefish, for example. Of course, how they cope will depend on the wider coral reef ecosystem, and there is ongoing debate about its ability to adapt to warmer waters. Other studies have also suggested that a similar species of clown-fish gets "tipsy" when water becomes more acidic, leading to them taking more risks.
What can be inferred from Paragraph 6?
选项 A、Different species will deal with climate change in different ways.
B、All the species can benefit more or less from climate change.
C、Fish is not the only species which can benefit from climate change.
D、Species which can adapt to climate changes would survive better.
答案C
解析 推断题。根据题干定位到第六段。根据But at least it won’t be all negative news for allspecies“但至少气候变化并不是对所有的物种来讲都是坏消息”可以推断出有些物种可以从气候变暖中得到好处，所以[C]选项正确。由第六段第一句it is hard to make predictions abouthow different species will cope with climate change可知“很难预测不同的物种如何应对气候变化”，但并不代表“不同的物种应对气候变化的方式不同”，所以[A]选项错误，可排除。[B]选项错误，理由见[C]项解析。[D]选项内容原文并未涉及，可排除。
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