2015年11月14日的雅思考试即将到来,烤鸭们都准备得怎么样了。考前几天如果不知道怎么复习,不用急,出国留学网雅思频道为您搜集整理了最新最权威的雅思预测真题,为您的雅思考试提供最好的指南。考前备考只是冲刺而已,要想在考试中拿高分,平时的积累才是最关键。下面是出国留学网小编整理的2015年11月14日雅思阅读真题预测,仅供参考。
2015年11月14日雅思阅读真题预测
Don’t wash those fossils!
Standard museum practice can wash away DNA.
1. Washing, brushing and varnishing fossils — all standard conservation treatments used by many fossil hunters and museum curators alike — vastly reduces the chances of recovering ancient DNA.
2. Instead, excavators should be handling at least some of their bounty with gloves, and freezing samples as they are found, dirt and all, concludes a paper in the Proceedings of the National Academy of Sciences today.
3. Although many palaeontologists know anecdotally that this is the best way to up the odds of extracting good DNA, Eva-Maria Geigl of the Jacques Monod Institute in Paris, France, and her colleagues have now shown just how important conservation practices can be. This information, they say, needs to be hammered home among the people who are actually out in the field digging up bones.
4. Geigl and her colleagues looked at 3,200-year-old fossil bones belonging to a single individual of an extinct cattle species, called an aurochs. The fossils were dug up at a site in France at two different times — either in 1947, and stored in a museum collection, or in 20...