B.The fourth and fifth.
C.The fifth and sixth.
D.The seventh.
答案:C 根据问题的内容可在文章的第五、六段找到答案。
B
(2015·湖北重点中学联考)
400yearold plants from the Little Ice Age were brought back to life, which could help us understand how the Earth will deal with climate change.
Moss (藓类植物) found buried beneath the Teardrop Glacier (冰川) on Ellesmere Island in Canada has been brought back to life. Findings suggest that these plants could help repopulate regions exposed by melting ice caps. Plants that were buried beneath thick ice in Canada more than 400 years ago and were thought to have frozen to death have been brought back to life by Canadian scientists.
Samples of the moss plant, covered by the glacier during the Little Ice Age of 1550 to 1850, were replanted in a lab at the University of Alberta and grew new stems (茎). Researchers now think these findings can give indication as to how regions can recover as the ice covering them melts.
Biologist Dr. Catherine La Farge and her team at the University of Alberta were exploring the region around the Teardrop Glacier on Ellesmere Island. Ice on Ellesmere Island region has been melting at around four meters each year for the past nine years. This means that many areas of land that were previously covered by ice have since been exposed. Many ecosystems that were thought to have been destroyed during the Little Ice Age between 1550 and 1850 can now be studied, including many species that have never been studied before.
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