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(灵长类动物)
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)
admin
2021-01-25
28
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 tare 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 0n their 0wn 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 tree.
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
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://kaotiyun.com/show/l88R777K
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
在对外经济侵略中,最具新殖民主义特点的做法是()
资本主义的发展史上殖民地对资本主义国家的发展起到的作用是()
人类区别于动物的根本标志是()
1958年,我们以麻雀吃粮食为由,把它列为“四害”之一,大量捕杀。实际上,麻雀虽然吃粮食,但主要吃害虫。所以,后来我们把麻雀从“四害”中解放出来。现在我们又把麻雀列为保护动物。从哲学上看,这件事说明了_______。
下列关于人的本质的表述,只涉及人与动物根本区别的是()
Americansareaveryenergeticandmobilepeople,alwaysontherun,rushingfromoneappointmenttoanother,fromaPTA(Parent-Tea
Americansareaveryenergeticandmobilepeople,alwaysontherun,rushingfromoneappointmenttoanother,fromaPTA(Parent-Tea
Itisdifficultto______theimplicationbetweenthelines.
Thegroupgradually_____(evolution)intoapoliticalparty.
随机试题
腹部外伤合并出血性休克,主要的处理原则是()
女,49岁。左侧后牙冷热刺激痛3个月,近日自发性锐痛,夜间明显,遇冷热刺激疼痛加重,疼痛放射至左侧的头颈部。临床检查见全口卫生情况一般,左侧上下颌第一磨牙均见深龋,有探痛,叩诊(-),为明确诊断最有用的诊断方法是
下列关于投资性房地产后续计量模式的转换的说法中,不正确的有()。
45。()年,国际联盟统计委员会提出了最早的“国际旅游者”的定义。
设(Ⅰ)α1,α2,α3,α4为四元非齐次线性方程组BX=b的四个解,其中求方程组(Ⅰ)的基础解系。
假设进行天气预报仅有“晴、云、阴、雨、雪、雾、霜、雹”等天气状况,需要通过某个八进制的数字通信系统传送,每秒钟播报一次,可接受的最低传输速率为(85)波特。
设有定义:doubex=5.16894;,则语句“printf("%lf\n",(int)(x*1000+0.5)/1000.);”的输出结果是()。
刘猛是某出版社的一名编辑,他的好朋友李杰发给他一篇科普文章(文章存放在“Word素材文件.docx”中),请他帮忙进行排版。假如你是刘猛,请按照如下要求帮助李杰完成相关排版工作:将正文中使用黄色突出显示的文本“图1”到“图10”替换为可以自动更新的交叉
Formuchofitshistory,psychologyhasseemedobsessedwithhumanfailingsandpathology.Theveryideaofpsychotherapy,first
A、Thefirstgroup.B、Thesecondgroup.C、Thelastgroup.D、Allthethreegroups.AWhichgroupofmiceisthehealthiestamongth
最新回复
(
0
)