2016届高考英语二轮专题总复习精选综合能力专练:阅读理解7
People diet to look more attractive. Fish diet to avoid being beaten up, thrown out of their social group, and getting eaten as a result. That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists.
The research team have discovered that subordinate fish voluntarily diet to avoid challenging their larger competitors. “In studying gobies we noticed that only the largest two individuals, a male and female ,had breeding(繁殖) rights within the group, ”explains Marian Wong. “All other group members are nonbreeding females, each being 5~10% smaller than its next largest competitor. We wanted to find out how they maintain this precise size separation.”
The reason for the size difference was easy to see. Once a subordinate fish grows to within 5 10% of the size of its larger competitor,it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not, the_evicted_fish_is then eaten up.
It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish. Whether they did so voluntarily,by restraining how much they ate, was not clear. The research team decided to do an experiment. They tried to fatten up some of the subordinate gobies to see what happened. To their surprise,the gobies simply refused the extra food they were offered,clearly preferring to remain small and avoid fights, over having a feast.
【2016届高考英语二轮专题总复习精选综合能力专练:阅读理解7】相关文章:
★ 2017届高考英语二轮复习大题冲关秘籍之日常交际用语大全:高考英语非谓语动词及其用法的常考点(含解析)
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (26)
★ 【三维设计】2017届高考英语(江苏专用)二轮复习阅读理解解题技法示范课件:10
★ 2017年高考英语二轮复习精品资料:专题14 阅读理解(教学案)(原卷版)
★ 【课堂新坐标】2017届高考英语(通用版)二轮复习短文改错专题训练:训练3 短文改错(Ⅲ)(含解析)
★ 【人教版】2014届高考英语一轮复习指导考点针对练:必修4 unit4《Body language》
★ 【北京专用】2014届高考英语一轮复习方案课时作业:选修6 Unit 4 Global warming
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (53)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21