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
2022-01-21
25
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) 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.
The author suggests that, because there are no hiding places in the oceans, whales and dolphins________.
选项
A、sleep only when they are very young
B、cannot afford to sleep very much
C、usually dream while awake
D、take turns to sleep
答案
B
解析
事实细节题。解题依据就在“There is no place to hide in the ocean”海洋中没有可以躲藏的地方,如果海豚和鲸鱼睡得多,便有被捕杀的危险。因此它们睡得很少。
转载请注明原文地址:https://jikaoti.com/ti/0PAfFFFM
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
Weallknowthathumansaredamagingtheenvironment,butwhatcanwedoaboutit?Somepeoplearetryingtodotheirbittobemo
Ihadanauto-repairmanonce,who,ontheintelligencetests,couldnotpossiblyhavescoredmorethan80,bymyestimate.Ial
Whatarethespecifictraitsthatwillassistexecutivestoclimbtheladderofsuccess?Opinionsvarywidely.Givenapproximatel
Themost______evidenceofblackholescomesfromresearchintobinarystarsystems.
Travelingcanbefunandeasy.Avacationtriptoanothercountryisespeciallyenjoyablewhenthetravelingconditionsaregood
CriticalReadingCriticalreadingappliestonon-fictionwritinginwhichtheauthorputsforthapositionorseekstomake
关于不同的工作态度,有些人喜欢始终如一地从事一种工作,有些人喜欢经常更换工作。请根据不同态度的阐述,以MyViewonJob—Changing为题写一篇150词左右的英语短文。
Threepassions,simplebut【C1】______(overwhelm)strong,havegovernedmylife:thelongingforlove,thesearchforknowledge,a
EvolutionofSleepSleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshareitwithalltheprimates(灵长类
EvolutionofSleepSleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshareitwithalltheprimates(灵长类动物)
随机试题
癫癎患者服用抗癫癎药的禁忌是
背景资料某机电安装工程公司承担了一机电工程项目的安装任务,合同工期为120d,合同价款为300万元。该安装工程公司项目经理部根据施工合同和自身的技术水平为该工程编制了施工组织设计,该施工组织设计包括施工组织总设计、单位工程施工组织设计和分部
按照波特的价值链理论,分析判断下列企业的各项活动所属的类别。(1)甲书店提供网络在线销售服务;(2)乙家电生产企业利用外包仓库储存其产成品;(3)丙快递公司重整其人力资源管理,提升员工的服务能力;(4)丁制鞋企业设立特定研究中心专门从事人体工程学和
投资中心的投资额为100000元,资本成本率为20%,剩余收益为10000元,则该中心的投资贡献率为()。
laugh,explain,takepartin,notmean,sweepaway,know,miss,invite,discuss,takeplaceIamsorryyou________thelasttrai
【2012年枣庄市】简述个体身心发展的一般规律。
拉动经济增长的三驾马车是()。
A、 B、 C、 D、 B排除法。A项应该排除,因为一定由两个空白面是相对的;C项应该排除,因为两个有黑点的是不能相邻的;D项应该排除,因为当阴影部分在上边时,相邻两面总有一面有黑点。
研究表明,糟糕的空气质量有可能导致疲劳、头痛等不适反应和更严重的各类疾病,而室内空气污染平均高于室外10倍。下列属于造成室内空气质量不佳的因素是:①空调②复印机、静电除尘器③生理代谢④尘螨
AccordingtotheEUsurvey,Britishmenspendmoretimeon______.Accordingtothepassage,whospendmoretimeonTVthanoth
最新回复
(
0
)