首页
登录
职称英语
Right and Left-handedness in Humans Why do humans, quite
Right and Left-handedness in Humans Why do humans, quite
游客
2024-02-28
0
管理
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) [br] Difference in the size of the two hemispheres exists in a monkey’s brain.
选项
A、Y
B、N
C、NG
答案
B
解析
见第四段最后一句“Since monkeys have not acquired the capacity for speech, one would not expect to see such a difference but Brinkman claims to have discovered a trend in monkeys towards the asymmetry that is clearly observed in the human brain.”
转载请注明原文地址:https://tihaiku.com/zcyy/3489672.html
相关试题推荐
"Humansshouldnottotrytoavoidstressanymorethantheywouldshunfood
"Humansshouldnottotrytoavoidstressanymorethantheywouldshunfood
"Humansshouldnottotrytoavoidstressanymorethantheywouldshunfood
Peoplefindthatlikehumanschimpanzees(黑猩猩)use"tools":theystriptwigs
Peoplefindthatlikehumanschimpanzees(黑猩猩)use"tools":theystriptwigs
Peoplefindthatlikehumanschimpanzees(黑猩猩)use"tools":theystriptwigs
Wehumansaren’ttheonlyoneswhowanttofitin.Researchershavediscover
RightandLeft-handednessinHumansWhydohumans,quite
RightandLeft-handednessinHumansWhydohumans,quite
RightandLeft-handednessinHumansWhydohumans,quite
随机试题
PeopleintheUScannowcarryanartificialintelligence(AI)aroundinthe
[originaltext]W:I’msoaked!ItstartedtopourtheminuteIgotoffthebus.M
我国古代第一个有伟大成就的爱国诗人是()A.许穆夫人 B.孔子 C.庄子
建筑业总产值包括( )。A.设备安装工程价值 B.建筑工程产值 C.被安装
气病的八会穴是A.中脘 B.太渊 C.膻中 D.悬钟 E.章门
属于碱性物质的是A.血红蛋白 B.细胞核蛋白 C.嗜碱性颗粒 D.淋巴细胞
关于Hb与O2结合的叙述中,哪一项是不正确的A.1分子Hb可以结合4分子O2
(2012年真题)下列项目中,免征土地增值税的是( )。A.个人继承的房产
用重点审查法对建设工程项目施工图预算进行审查,审查的重点是()。A、单价高的工
男.45岁,商人,有不洁性交史5天,1天前尿道疼痛出脓。查体:尿道口可见大量黄色
最新回复
(
0
)