RC7 beetle 化石与气候变化 共段 难度¬¬¬¬
版本一
说beetle（甲虫）的化石可以用来判断过去1.5 Milliom year的气候变化。主要说到了beetle化石为啥是判断气候变化的好标准，还说道了食肉beetle和食草beetle用作判断气候变化的标准时候的不同，主要是食肉beetle对气候变化的反应更加直接。最后一段说怎么用beetle化石来判断气候变化。最后一段的作用有个题目。
最后一段有题，我实在看不懂，好像跟一个H打头的什么beetle比较的。 1.5 Milliom year那里也有题，就在头两句话，不过我实在没看懂，题也是蒙的。
版本二
说发现一种beetle 的fossil 里面的几种化学物质可以证明什么古代的时间
版本三
说BEETLES的化石测定天气变化的方法比很多方法实用因为活动范围大而捕食的BEETLES比食草的更适合因为食草的活动范围小
版本四
说了这种化石可以反映气候变迁。他们对环境变化敏感并且在各种各样的环境中都有其身影。但是千百年来他们没有多大不同，因此他们生存的环境也比较恒定。第二段说了怎样用诸实践。
版本五
是甲壳虫的那个，问了甲壳虫比pollen的优势，还有一个主题题，看得比较晕
帮助阅读一
Beetles are the most species-rich group of organisms on Earth and intuitively it would seem that they must evolve rapidly. Climatic changes, especially those resulting in the growth and（溶化）melting of ice sheets, cause the fragmentation and isolation of biological populations. The conditions for reproductive isolation and allopatric（分布在近邻的不同地区） speciation would seem to be optimal at times of climate change. Several hundred species of beetles have now been reported from a large number of studies of Pleistocene and Holocene fossil assemblages.
帮助阅读二
Beetles occur almost everywhere, vary hugely in size and are both prey and predators in the garden. Some of the attractive ground beetles may eat slugs, click beetles eat snails, while other beetle species are entirely vegetarian, often living off decaying matter. Adult beetles may be eaten by common lizards（蜥蜴）, common toads（蟾蜍）and by many species of bird including little owls and kestrels, as well as by mammals as different as foxes, badgers and pipistrelle and other bats. Beetle larvae provide food for a range of vertebrate species and may themselves also be vegetarian（素食者） or carnivorous（食肉者）.
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发表于 2010-10-26 23:22:52
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