首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Right and Left-handedness in Humans Why do humans, quite different from the other animal species, display a distinct left or
Right and Left-handedness in Humans Why do humans, quite different from the other animal species, display a distinct left or
admin
2010-05-26
40
问题
Right and Left-handedness in Humans
Why do humans, quite different from the other animal species, display a distinct left or right handedness? Not even our closest relatives among the apes(猿) possess such decided lateral(横向的,侧面的) asymmetry(不对称), as psychologists call it. Yet about 90 per cent of every human population that has ever lived appears to have been right-handed. Professor Bryan Turner at Deakin University has studied the research literature on left-handedness and found that handedness goes with sidedness. So nine out of ten people are right-handed and eight are right-footed. He noted that this distinctive asymmetry in the human population is itself systematic. "Humans are able to think about things in categories: black and white, up and down, left and right, It’s a system of signs that enables us to categorize phenomena that are essentially ambiguous."
The Relationship of Handedness to Gene and Inheritance
Research has shown that there is genetic or inherited(遗传的) element to bandedness. But while left-handedness tends to appear in families, neither left nor right handers will automatically produce children with the same handedness; in fact about 6 per cent of children with two right-handed parents will be left-handed. However, among two left-handed parents, perhaps 40 per cent of the children will also be left-handed. With one right and one left-handed parent, 15 to 20 per cent of the children will be left-handed. Even among identical twins who have exactly the same genes, one in six pairs will differ in their handedness.
Researchers Turned to the Brain for Reasons
while anything on the left is dangerous or even evil. We speak of left-handed advantages, and on the other hand according to Moore, "it is certain that left-handers often develop a stammer(口吃) as they are robbed of their freedom of speech." However, as more research is undertaken on the causes of left handedness, attitudes towards left-handed people are gradually changing for the better. Indeed when the champion tennis player Ivan Lend was asked what the only factor had improved his game, he said he would like to become a left-hander.
Geoff Maslen (Adapted)
The right half of the body is controlled by ______ of the brain.
选项
答案
the left hemisphere
解析
见第三段“He noted that since the left hemisphere (半球) of the brain controls the right half of the body, and vice versa.”
转载请注明原文地址:https://jikaoti.com/ti/q5LFFFFM
0
大学英语四级
相关试题推荐
A、Heshouldbasehispaperonalotofresearch.B、Heshouldincludelessargumentsinhispaper.C、Heshouldusehisexperience
A、Insectsarearoundlongbeforepeoplewere.B、Therearefarmoreinsectsthantherearehumans.C、Insectsleadahappierlife
Dogsaresocialanimalsandwithoutpropertraining,theywillbehaveaswildanimals.Theywillsoilyourhouses,【M1】_
A、Tomakeplansforthedevelopmentofpoorcommunities.B、Toteachpeoplehowtousenewskillstoraiseanimals.C、Tohelpsta
Socialchangeismorelikelytooccurinsocietieswherethereisamixtureofdifferentkindsofpeoplethaninsocietieswhere
Educationistooimportanttotake【B1】______.Whenpeopletakeanythingtooseriously,theyputonblinders,whichcausethemto
Educationistooimportanttotake【B1】______.Whenpeopletakeanythingtooseriously,theyputonblinders,whichcausethemto
I’vecomefromProf.LIwith______(他让我告诉你他今天不能来看你了).
TheAmericaneconomicsystemisorganizedaroundabasicallyprivate-enterprise,market-orientedeconomyinwhichconsumerslarg
Thisisoneofthelaboratoriesthat______(今天建成的)inourinstitute.
随机试题
下列组织中,不发生纤维素样坏死的是
A悬垂腹B跨耻征为阴性C常以枕后位入盆D出现持续性枕横位E第二产程停滞中骨盆平面狭窄的临床表现
起重机载物行走时,荷载不得超过额定荷载的70%,重物离地面不得超过()mm,并应拴好拉绳,缓慢行驶。
根据适当过度学习原则,如果一个学生学10遍刚好记住一个英语单词,那么他需要学习________遍学习效果会更佳。
Haveyoueveraskedyourselfwhychildrengotoschool?Youwillprobably【C1】______theygotolearnlanguages,geography,histo
在布置会场时,职务或地位最高者应安排在主席台第一排的()。
圆珠笔(签字笔、中性笔)是我们很熟悉的书写工具。在设计制造时,笔芯内的油墨量与金属笔嘴的寿命存在科学的对应关系,且笔芯上端通常都留有一小孔。关于这些设计的说法不正确的是()。
1929年12月下旬,红四军党的第九次代表大会在福建上杭县古田村召开,会议总结了红军创立以来的经验,通过了著名的古田会议决议。决议的中心思想是
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
A、Rightnow.B、Thisweek.C、Nextweek.D、Twoweekslater.C根据对话中女士的回答,可直接判断出交实验报告的时间为一周以后(aweeklater),即下个星期。因此,C项是正确答案。
最新回复
(
0
)