标签：evolution 相关文章

英语听力文摘 English Digest 618、美国人的头越来越大了

Americans Heads Are Getting Bigger The story of human evolution goes something like this: Millions of years ago, homo sapiens began to evolve from the prehistoric ancestor we share with our monkey cousins. First, we evolved the ability to walk uprigh

发表于:2018-12-31 / 阅读(53) / 评论(0) 分类 英语听力文摘 English Digest

2006年VOA标准英语-Anthropologists Discover A 'Missing Link'

By Jessica Berman Washington 12 April 2006 An international team of anthropologists has discovered fossils in eastern Ethiopia that they say may be a missing link between our earliest and more modern

发表于:2019-02-04 / 阅读(132) / 评论(0) 分类 2006年VOA标准英语（四月）

英语听力文摘 English Digest 427、神奇的进化

Maggot evolution 蝇蛆的进化 You may already know how the evolution of a new species happens. Two or more populations of one species have to be separated from each other, such as is the case with Darwins finches in the Galapagos. Various populati

发表于:2019-02-16 / 阅读(50) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 231、种群动态进化

Rapid Evolution and Population Dynamics 种群（population）指在一定时间内占据一定空间的同种生物的所有个体。种群中的个体并不是机械地集合在一起，而是彼此可以交配，并通过繁殖将各自的基因传给

发表于:2019-03-09 / 阅读(213) / 评论(0) 分类 英语听力文摘 English Digest
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