首页
登录
职称英语
[originaltext] We’ve been looking at fear from a biological perspective, and
[originaltext] We’ve been looking at fear from a biological perspective, and
游客
2024-02-15
35
管理
问题
We’ve been looking at fear from a biological perspective, and someone asked whether the tendency to be fearful is genetic. Well, some studies done with mice indicate that mammals do inherit fearfulness to some degree. In one study, for instance, a group of mice was placed in a brightly-lit open box with no hiding places. Some of the mice wandered around the box and didn’t appear to be bothered of being so exposed. But other mice didn’t move. They stayed up against one wall, which indicated that they were afraid. Well, when fearful mice, or you might say anxious mice like the ones who stayed in one place, when mice like these were bred with one another repeatedly, after about 12 generations or so, then all of the offspring showed similar signs of fearfulness. And even when a new-born mouse from this generation was raised by a mother and with other mice who were not fearful, that mouse still tended to be fearful as an adult. Now why is this? Well, it’s thought that specific genes in an animal’s body have an influence on anxious behavior. These are genes that are associated with particular nerve-cell receptors in the brain. And the degree of overall fearfulness in the mammal seems to depend in large part on the presence or absence of these nerve-cell receptors. And this appears to apply to humans as well by the way. But while a tendency towards anxiety and fear may well be an inherited trait, the specific form that the fear takes has more to do with the individual’s environment. So a particular fear, like the fear of snakes or the fear of spiders, say, is not genetic, but the overall tendency to have fearful responses is.
Questions 33 to 35 are based on the passage you have just heard.
33. What is the talk mainly about?
34. How did some of the mice in the study demonstrate that they were afraid?
35. Why does the professor mention snakes and spiders?
选项
A、How animals react to frightening situations.
B、Why mice are particularly fearful animals.
C、Whether fearfulness is a genetic trait.
D、Why certain animals are feared by humans.
答案
C
解析
选项概括性强,本题可能考查短文主旨。根据短文中的We’ve been looking at fear…that mammals do inherit fearfulness to some degree可知,本文主要讨论的是:Whether fearfulness is a genetic trait.故答案为C)。
转载请注明原文地址:https://tihaiku.com/zcyy/3451427.html
相关试题推荐
[originaltext]RooseveltwastheonlypresidentinAmericanhistorywhoserv
[originaltext]RooseveltwastheonlypresidentinAmericanhistorywhoserv
[originaltext]W:Hello!Canyouintroduceyourselfplease?M:Sure,mynameis
[originaltext]W:Hello!Canyouintroduceyourselfplease?M:Sure,mynameis
[originaltext]W:Hello!Canyouintroduceyourselfplease?M:Sure,mynameis
[originaltext]W:Sir,you’vebeenusingtheonlinecatalogueforquiteawhile.
Readinginvolveslookingatgraphicsymbolsandformulatingmentallythesou
Readinginvolveslookingatgraphicsymbolsandformulatingmentallythesou
Readinginvolveslookingatgraphicsymbolsandformulatingmentallythesou
Readinginvolveslookingatgraphicsymbolsandformulatingmentallythesou
随机试题
[audioFiles]2016m12s/audio_ezfj_201610_018[/audioFiles]Children’sHealth
Directions:Forthispart,youareallowed30minutestowriteashortessayent
企业是安全生产的责任主体,也是安全生产标准化建设的主体。()
落锤式弯沉仪组成不包括()A.荷载发生装置 B.弯沉检测装置 C.载重汽车
什么是幼儿园一日生活常规(2分)试述培养幼儿一日生活常规意义和方法。(18分)
资本一帝国主义列强对中国不但进行军事侵略、政治控制,还对中国进行经济掠夺。其对中
下列哪项不是MDS的特点?( )A.老年多见 B.血细胞病态造血 C.易转
《孔乙己》中下列行为及说法符合现代法律规定的是()A.丁举人打折孔乙己的腿
物流成本管理的主要方法有( )。A.比较分析法 B.定量分析法 C.综合评价
关于多品种小批量型生产物流特征的说法,错误的是()。A.物料被加工的重复程度介于
最新回复
(
0
)