新东方网>BBC>BBC英语教学>潮流英语>媒体英语>正文

科学家揭示花卉“祖先”的样貌

2017-08-11 11:23

来源:BBC

作者:

媒体英语

Ancestor of all flowers revealed by scientists 科学家揭示花卉“祖先”的样貌

文字稿

一项发表在《自然通讯》杂志上的研究表明,地球上现存的所有花卉植物都可以追溯到1.4 亿年前的同一个“祖先”。科学家们通过计算机将花卉演化的模型与现存最大的鲜花特征数据库组合在一起,推测出地球上第一朵花的样貌。请听报道。

From roses and lilies to cherry trees and wheat, there are hundreds of thousands of species of flowering plants, and every single one of them traces back to a single ancestral flower that grew 140 million years ago.

Now by analysing the evolutionary differences between living species to track how the floral features have changed over time, scientists have been able to reconstruct this ancient bloom’s appearance. And instead of the primitive-looking species they were expecting, a complex, multi-part organism has emerged.

The flower had concentric circles of petal-like features which are grouped in sets of threes, with multiple male and female reproductive organs.

Some questions about this species remain, such as its colour and size. Scientists say a fossil of the bloom could help, although no floral relics from this ancient period have yet been found.

词汇表

traces back to 追溯到
ancestral 祖先的
evolutionary 进化上的 
changed over time 随着时间改变了
reconstruct 重新组建,重现
bloom 花朵
primitive-looking 看着很原始、很简单的
complex 复杂的
emerged 呈现出来
concentric 有同一中心轴的
petal-like 像花瓣一样的
floral relics 花的遗迹

测验

请听报道并回答下列问题。

1. What kind of plants are roses and lilies?

2. Is the ancestral flower a very primitive looking plant?

3. True or false? Scientists have found evidence of the first flower from fossils.

4. Which word in the text means ‘a distinctive attribute or aspect of something’?

答案

1. What kind of plants are roses and lilies?
Roses and lilies are flowering plants.

2. Is the ancestral flower a very primitive looking plant?
No, according to the text, the ancestral flower is a complex, multi part organism.

3. True or false? Scientists have found evidence of the first flower from fossils.
False. There are no floral relics from this ancient period yet.

4. Which word in the text means ‘distinctive attributes or aspects of something’?
Features.

官方微信:新东方英语 (微信号:xdfyyw

听说读写译学习方法、英美剧最新资讯,请扫二维码,关注我们! 

猜你喜欢

  • 听力
  • 口语
  • 阅读
  • 娱乐
  • 词汇
  • 写作

            新东方英语辅导专区

            班级名称 上课地点 上课时间 费用 详细

            焦点推荐

            版权及免责声明

            凡本网注明"稿件来源:新东方"的所有文字、图片和音视频稿件,版权均属新东方教育科技集团(含本网和新东方网) 所有,任何媒体、网站或个人未经本网协议授权不得转载、链接、转贴或以其他任何方式复制、发表。已经本网协议授权的媒体、网站,在下载使用时必须注明"稿件来源:新东方",违者本网将依法追究法律责任。

            本网未注明"稿件来源:新东方"的文/图等稿件均为转载稿,本网转载仅基于传递更多信息之目的,并不意味着赞同转载稿的观点或证实其内容的真实性。如其他媒体、网站或个人从本网下载使用,必须保留本网注明的"稿件来源",并自负版权等法律责任。如擅自篡改为"稿件来源:新东方",本网将依法追究法律责任。

            如本网转载稿涉及版权等问题,请作者见稿后在两周内速来电与新东方网联系,电话:010-60908555。

            热搜关键词