Hi,
订阅
报纸
纸质报纸 电子报纸
手机订阅 微商城
英语
学习
mr007娱乐 翻译协作
mr007娱乐 国际学校
口语
演讲
精彩视频 名人演讲
演讲技巧 口语训练营
教育
资讯
新闻资讯 语言文化
备课资源 经验交流
用报
专区
中学Teens
小学Kids
21英语教师网 > 备课资源 > 拓展阅读 > 正文
Rats may be key to fighting disease
作者:21ST    来源:21mr007娱乐    日期: 2012-09-21
人教版高二年级:First aid

关键词:Medicine; First aid; Safety in the home; medication

话题归类:热点话题Topical issues
 
RATS have a lot more in common with humans than you may think! Scientists have just mapped out the entire chemical makeup of the common rat.

The rat is just the third animal to have its genes mapped out. The other two are humans and mice.

Genes are tiny sets of chemical instructions that determine how each living creature looks and behaves. They also help determine why we get sick from certain diseases.

This new research will help scientists fight illnesses by identifying disease-related genes. It will also advance medical research into how genes and the environment affect our health. The research was reported in the Nature magazine.

Why do scientists study rats?

Rats are often used by scientists to learn more about diseases and medicine.

What's so special about rats? This new research shows that a Norway rat has more than 25,000 genes and about 90 percent of those genes are just like the ones you'd find in mice and people! Scientists believe all three species shared a common ancestor about 75 million years ago.

There are some major differences among the three animals. For example, the rat relies more heavily on its sense of smell than a human. It also has more genes devoted to smelling and identifying scents.

One of the more surprising findings is how fast genes changed, over time. Scientists believe that this may mean that rats are more easily able to adapt to their environment.

Said Howard Jacob of the Medical College of Wisconsin, the co-author of the study: This discovery "is simply a revolution in the way we can practice basic research."

Fast fact

There are about 50,000 genes we inherit from our parents that make us look the way we do.

2004 Time Inc. All Rights Reserved.

TIME FOR KIDS and Timeforkids.com are registered trademarks of Time Inc.

KRT
 



关键词:人教版 高二 First aid 热点话题 Topical issues
 打印


相关文章







 


Most Popular

 
热点翻译问题

 
 

标题
内容
关闭
内容
联系我们   |    广告业务   |   演讲比赛   |   合作伙伴   |   关于我们   |   手机访问   |   全站链接   
有意与本网站合作者,有关合作事宜请联系我们。未经21mr007娱乐书面授权,请勿转载或建立镜像,否则即为侵权。
主办单位:中国日报社 Copyright www.i21st.cn All Rights Reserved 版权所有 复制必究   


mr007娱乐