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SSS 2008-03-19

时间:2010-05-13 03:32来源:互联网 提供网友:0922013129   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American’s 60-Second Science. I am Cynthia Graber. This will just take a minute.
Ants are known for working together, operating as a unit for the good of the colony. But not so fast, say researchers from the Universities of Leeds and Copenhagen. It turns out that ants can scheme like a stage mom. Scientists say that some ants hide out to ensure that their offspring become child-bearing queens instead of barren workers. They accepted hypothesis had been that random1 ants were fed certain foods that would allow them to develop into queens. But DNA2 tests on five colonies of leaf-cutting ants revealed that certain males have a better genetic4 chance of producing royal progeny5. Scientists believe these rare males stay anonymous6, and thus avoid any problems with other ants that might otherwise lose their ‘one for all, all for one’ attitude. In fact, the number of males carrying royal genes7 to those who aren’t may have settled at a low ratio through evolution which cobbled together the best way for ant gene3 pool to expand or at the same time keeping the lucky males hidden from their possibly jealous rivals.
Thanks for the minute, for Scientific American, 60-Second Science. I am Cynthia Graber.


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1 random HT9xd     
adj.随机的;任意的;n.偶然的(或随便的)行动
参考例句:
  • The list is arranged in a random order.名单排列不分先后。
  • On random inspection the meat was found to be bad.经抽查,发现肉变质了。
2 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
3 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
4 genetic PgIxp     
adj.遗传的,遗传学的
参考例句:
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
5 progeny ZB5yF     
n.后代,子孙;结果
参考例句:
  • His numerous progeny are scattered all over the country.他为数众多的后代散布在全国各地。
  • He was surrounded by his numerous progeny.众多的子孙簇拥着他。
6 anonymous lM2yp     
adj.无名的;匿名的;无特色的
参考例句:
  • Sending anonymous letters is a cowardly act.寄匿名信是懦夫的行为。
  • The author wishes to remain anonymous.作者希望姓名不公开。
7 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
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