单倍数染色体

SSS 2011-12-27

This is Scientific American's sixty seconds science, I'm Steve Mirsky. Got a minute? The eastern green tree frog looks exactly like the close related cops gree tree frog, the big difference between the two species is beneath the surface. The eastern

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Scientific American(十二)月

听电影学英语-姐姐的守护者 03

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发表于:2018-12-07 / 阅读(194) / 评论(0)

听电影学英语-姐姐的守护者

SSS 2008-05-21

This is scientific American's 60-Second Science, I'm Christopher Intagliata. Got a minute? The yeast Candida albicans ekes out a quiet living in our gut. But its a tough life. It faces acids and enzymes, and the immune system always bullies invaders.

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SSS 2008-06-30

This is Scientific American's 60-Second Science, I am Steve Mirsky,Got a minute? A team of Finnish and American geneticists has found that that, for some people at least, music is in their genes. In what the researchers called the first study of its

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Scientific American(六)月

SSS 2008-01-30

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Every expecting mother gets asked the question: boy or girl? For mammals like us, its an easy call. Two X chromosomes you get pink booties. X and a Y you g

发表于:2018-12-24 / 阅读(254) / 评论(0)

Scientific American(一)月

【一起听英语】男女比例会失衡吗

今天文章讲的是男性基因染色体的问题，如果男性染色体正发生着变化，会造成地球上男女比例失衡吗？ Neil: Hello and welcome to Six-Minute English from BBC Learning English, I'm Neil and with me today is Rosie. R

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一起听英语

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World Down Syndrome Day is on March the 21st every year. It is on this day because the number 21 is important in the identification of Down Syndrome. The condition is created by a 21st, extra chromosome being replicated three times, thus causing the

发表于:2018-12-29 / 阅读(203) / 评论(0)

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For thousands of years, humans have used yeast for making bread and alcoholic drinks, such as beer. But scientists are now constructing synthetic yeast that can do more than make a sandwich or a drink. The synthetic yeast can be used for medicines, v

发表于:2019-01-02 / 阅读(186) / 评论(0)

2017年VOA慢速英语(八)月

The extinction of men

Neil: Hello and welcome to Six-Minute English from BBC Learning English, I'm Neil and with me today is Rosie. Rosie: Hi there. Neil: Well, today we're talking about men. Rosie: That sounds interesting. Neil: It is very interesting especially if you'r

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六分钟英语

CNN 2010-12-03

Are you in the holiday spirit yet? Well, let's take you Cross Country, beginning in Pittsburgh, Pennsylvania. You might now. Its pretty. Bob Cox loves to make the holiday light display a pretty big spectacle with 150,000 computer-animated lights. Now

发表于:2019-01-07 / 阅读(152) / 评论(0)

CNN2010年(十二)月

SSS 2009-10-05

The 2009 Nobel Prize in physiology or medicine goes to Harvards Jack Szostak, Johns Hopkinss Carol Greider and Elizabeth Blackburn at U.C. San Francisco for their work on how chromosomes are protected by telomeres and the enzyme telomerase. The Nobel

发表于:2019-01-08 / 阅读(170) / 评论(0)

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SSS 2009-06-05

This is Scientific American's 60-second Science. I'm Karen Hopkin, this will just take a minute. When it comes to lizards' sex, size dose matter. But not in the way you might think. Because in the June 4th online issue of Journal Current Biology, sci

发表于:2019-01-08 / 阅读(166) / 评论(0)

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SSS 2011-03-04

Every villain has his Achilles' heel. And microscopic scoundrels are no exception. The challenge for those who wish to ward off microbial bad guys is to identify that weak spot. Now, scientists studying the toxoplasmosis parasite think they've done j

发表于:2019-01-08 / 阅读(179) / 评论(0)

Scientific American(三)月

VOA慢速英语2012 PEOPLE IN AMERICA - Barbara McClintock, 1902-1992: She Made Discoveries about Genes and Chromosomes

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Scientists solve mystery over copycat butterflies

CANBERRA, Aug. 17 (Xinhua) -- Australian scientist on Wednesday said his international research team has discovered the trick on how butterfly learn to change its wing pattern to avoid being eaten by birds. The Amazonian butterfly, Heliconius numata,

发表于:2019-02-06 / 阅读(133) / 评论(0)

英语新闻

“雪糕香蕉”带你进入香蕉的奇妙世界

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发表于:2019-02-06 / 阅读(181) / 评论(0)

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雅思阅读动植物类真题：塔斯马尼亚虎

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发表于:2019-02-25 / 阅读(289) / 评论(0)

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