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
A、To show the relationship between fearfulness and environment. B、To give examples of animals that aren’t fearful. C、To compare
A、To show the relationship between fearfulness and environment. B、To give examples of animals that aren’t fearful. C、To compare
admin
2009-04-23
61
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 or so generations, 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 of 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.
选项
A、To show the relationship between fearfulness and environment.
B、To give examples of animals that aren’t fearful.
C、To compare fear in mammals to fear in other animals.
D、To identify the nerves that control fear in certain animals.
答案
A
解析
Why does the professor mention snakes and Spiders?
转载请注明原文地址:https://kaotiyun.com/show/YOZK777K
0
大学英语六级
相关试题推荐
A、Howtooperatemachines.B、Howtousecomputers.C、Howtocollectinformation.D、Howtobeamanager.A男士提到想制订一个培训计划后紧接着说明了原因:
WhydidTinacometotheemploymentagency?Tolookfor______.
Rockwatch—TheBestClubonEarthIfyouareayoungpersonandinterestedingeology(地质学),thenRockwatchistheclubfory
Couldyoulookintotheeyesofchildrenandtellthemtheywillhavenothingtoeattonight?Wecan’t,either.That’swhyw
A—ChildHelpJ—PersonalMoneyB—DamagedBaggageK—RentalVehicleExcessC—DelayedBagg
Marketingbye-mailingisontheincrease.Comparedtoothermedia,e-mailmessagesareextremelycheaptosend.WithTV,youare
Ifthere’soneman_______opinionmattersmorethananyothers’,it’sourmanager.
Weallbelievethatitishardforhimtotakeupother(responsible)______now.
Twoyearsago,myhusbandboughtmeabicycle.Ifyouliveintown,itisoftenfasterthanacarandyou______worryaboutparki
Comparedwiththeotherwashingmachines,ithasmorechoicesofwashingmodes,intelligentmethodsofoperationandconceptofwa
随机试题
光镜下无法看到的细菌的特殊结构是()
2016年1月,甲、乙、丙、丁共同出资设立一有限合伙企业A。其中,甲、乙、丙为普通合伙人,丁为有限合伙人。甲负责执行合伙企业事务。2016年3月,丁又与戊共同设立从事与本合伙企业相竞争的业务的另一合伙企业,其他合伙人认为丁违反了竞业禁止义务,要求丁退出A
员工处理与领导的关系时,正确的做法是()。
西方第一本以“教育心理学”命名的专著是()心理学家桑代克出版的《教育心理学》。
党对公安工作的直接领导,就是要求公安机关()。
精简机构和人员,是政府机构改革的关键和核心;只有机构和人员精简了,转变政府职能才能到位。()
500名士兵排成一列横队。第一次从左到右1、2、3、4、5(1至5)依次报数;第二次反过来从右到左1、2、3、4、5、6(1至6)依次报数,既报55(报6的士兵有多少名?
已知有向图G=(V,A),其中V={a,b,c,d,e},A={<a,b>,<a,c>,<d,c>,<d,e>,<b,e>,<c,e>}。对该图进行拓扑排序,下面序列中不是拓扑排序的是()。
【2011中山大学分析与论述题第1题】在1998—2009年期间,中国上市公司所持有的“现金和现金等价物”占“总资产”的比重为15%,部分公司的比率升值高达80%。我们知道,虽然现金和现金等价物是公司内部最具有流动性的资产,但其收益率也是最低的,请分析,上
Inthepast,theParkServicefocusedonmakingthebigscenicparksmore【C1】______andcomfortablefortourists.Roadswerepave
最新回复
(
0
)