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
自考
Evolution of Sleep Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share it with all the primates(灵长类
Evolution of Sleep Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share it with all the primates(灵长类
admin
2017-04-24
83
问题
Evolution of Sleep
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share it with all the primates(灵长类动物) and almost all the other mammals and birds; it may extend back as far as the reptiles (爬行动物).
There is some evidence that the two types of sleep, dreaming and dreamless, depend on the life-style of the animal, and that predators(食肉动物) are statistically much more likely to dream than prey, which are in turn much more likely to experience dreamless sleep. In dream sleep, the animal is powerfully immobilized (使固定不动) and remarkably unresponsive to external stimuli. Dreamless sleep is much shallower, and we have all witnessed cats or dogs cocking their ears to a sound when apparently fast asleep. The fact that deep dream sleep is rare among prey today seems clearly to be a product of natural selection, and it makes sense that today, when sleep is highly evolved, the stupid animals are less frequently immobilized by deep sleep than the smart ones.
But why should they sleep deeply at all? Why should a state of such deep immobilization ever have evolved? Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in general seem to sleep very little. There is, by and large, no place to hide in the ocean. Could it be that, rather than increasing an animal’ s vulnerability, the function of sleep is to decrease it? Wilse Webb of the University of Florida and Ray Meddis of London University have suggested this to be the case. It is conceivable that animals who are too stupid to be quiet on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep. The point seems particularly clear for the young of predatory animals. This is an interesting notion and probably at least partly true.
It can be inferred from the passage that animals that are prey rarely experience dream sleep because they______.
选项
A、have evolved further than predators
B、are particularly intelligent animals
C、need less sleep than predators
D、would be caught if deeply asleep
答案
D
解析
射推理判断题。文章在第二段中交代,在做梦的睡眠中,动物是一动不动的,对外界刺激毫无反应,这样的情况对被捕食的动物很危险,因为它们如果睡得很死,就有可能被食肉动物吃掉。所以我们可以推断,这些动物睡觉时很少做梦,因为熟睡会被别的动物逮住。
转载请注明原文地址:https://kaotiyun.com/show/D18R777K
本试题收录于:
英语(二)题库公共课分类
0
英语(二)
公共课
相关试题推荐
某公司承担航空和公路运输业务,计算货物运费规则的决策表,如题42图所示。根据决策表画出相应的决策树,要求不能改变处理逻辑,运费单位为元。
在对外经济侵略中,新殖民主义不同于老殖民主义的手法是()
Howoftenonehearschildrenwishingtheyweregrownup,andoldpeoplewishingtheywereyoungagain.Eachagehasitspleasures
Howoftenonehearschildrenwishingtheyweregrownup,andoldpeoplewishingtheywereyoungagain.Eachagehasitspleasures
Anunderstandingofman’seffectonthebalanceofnatureiscrucial(关键的)tobeingabletofindtheappropriateremedialaction.
InBritain,______thepublicschools,thereisacompletesystemofstateprimaryandsecondaryeducation.
Manyteachersbelievethattheresponsibilityforlearninglieswiththestudents.Ifalongreadingassignmentisgiven,instruc
SpiritualBondBesides,donotforgettoappreciatethe"spiritualbond"betweenpeople.I’vemetnumerouspeopleinJapan,
A.arecurrentthemeB.tokeepaheadofscientificadvancesC.readingbooksofsciencefictionD.politicalimplicationsE.a
RareFossilRecordThepreservationofembryosandjuvenilesisarareoccurrenceinthefossilrecord.Thetiny,delicates
随机试题
初孕妇,胎头拨露1小时30分钟,产程无进展,宫缩持续50秒,间隔2~3分钟,强度中等,胎心正常,孕妇一直屏气加腹压,下列最适宜的处理方法为
病损常变换位置应与白斑鉴别
助消化药不宜与抗菌药物、吸附剂同时服用,如必须联用,应间隔的时间是
混凝土搅拌机每罐需加入干砂190kg,若砂子含水率为5%,则每罐实际加的湿砂量是:[2012—005]
按照FIDIC《施工合同条件》中有关风险责任划分的规定,业主应承担的风险包括( )。
支付担保的担保额度为工程总额的( ),本段清算后进入下段。
个人独资企业和合伙企业投资者应纳的个人所得税税款,按年计算,分月或者分季预缴,年度终了后()汇算清缴,多退少补。
当心理咨询员不表明自己的态度会谈就无法进行时,心理咨询员也应当()。(2003年12月三级真题)
教学媒体的选择依据包括()
假设你是李华,在一家电脑公司工作,业余时间参加英语口语培训,但下周二的培训你因故无法参加。请你根据以下要点,向你的外籍教师sam写一个请假条。内容要点如下:1.很抱歉不能参加下周二的培训;2.理由:经理派你去北京出差三天;3.请Smith帮你把课程
最新回复
(
0
)