课程咨询

托福考试网 托福资料下载 托福资讯 0元讲座 水平测试

托福考试练习
新东方在线 > TOEFL > 托福阅读 > 正文
托福培训

扫码免费领资料

内含托福全科备考资料

更有免费水平测试及备考规划

托福培训

扫码关注掌握一手留学资讯

回复XDF免费水平测试

录播精讲 直播课HOT

托福阅读句子简化题：Geographically Isolated Populations

2015-08-24 16:07:00来源：网络

　　【托福阅读题型：Geographically Isolated Populations句子简化题】托福阅读中句子简化题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

　　查看全部：托福阅读题型分类练习之句子简化题

　　托福阅读句子简化题：Geographically Isolated Populations

　　【Paragraph 6】Graves drew two conclusions from these observations. First, at least some of the observed　differences between the enzymes of the Atlantic and Pacific fish populations were not random but were the result　of evolutionary adaptation. Second, it appears that closely related populations of fishes on both sides of the　isthmus are starting to genetically diverge from each other. Because Graves’s study of geographically isolated　populations of isthmus fishes offers a glimpse of the beginning of a process of gradual accumulation of mutations that　are neutral or adaptive, divergences here might be evidence of allopatric speciation in process.(Speciation in　Geographically Isolated Populations)

　　Which of the sentences below best expresses the essential information in the highlighted sentence in the　passage? Incorrect choices change the meaning in important ways or leave out essential information.

　　○ Graves’s study provides evidence that isthmus fishes are in the process of becoming geographically isolated.

　　○ Graves’s study of mutating isthmus fishes yields results that differ from results of other studies involving　allopatric speciation.

　　○ Graves’s study of isolated populations of isthmus fishes provides some evidence that allopatric speciation　might be beginning.

　　○ Graves’s study indicates that when isolated, populations of isthmus fishes register neutral or adaptive　mutations.

　　答案见下一页：

本文关键字: 托福阅读题型 托福阅读训练 句子简化题

上一页 1 2 下一页

托福辅导

关注新东方在线托福

托福机经·Official题目练习

考前重点突破·听说读写海量资料

更多资料

关注新东方在线托福，
回复【XDF】获取大礼包

托福辅导
  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加】，回复对应关键字领取学习资料。
更多>>
更多内容

免费获取托福备考大礼包

微信扫描下方二维码 立即领取

托福辅导
更多>>
更多公益讲座>>
更多>>
更多资料
托福TPO 托福听力练习 托福口语练习 托福阅读练习 托福写作练习
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10