首页
登录
职称英语
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share
游客
2023-07-15
48
管理
问题
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, rattier than increasing an animal’s vulnerability, Ray Meddis of London University has suggested this to be the case. It is conceivable that animals that are too stupid to be quite 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. [br] Compare with dreamless sleep, deep dream sleep is______.
选项
A、not the result of natural selection
B、less likely to appear to primates
C、more protective to the animals
D、at a higher stage of evolution
答案
D
解析
根据第2段倒数第3句及末句,可以推断与无梦睡眠相比,深睡不动处于更高的进化阶段。文中虽有提及无梦睡眠对于被捕食动物来说是一种自然选择,但并不意味着深睡不动不是自然选择,因此A不正确;该句也提到“笨拙的动物与敏捷的动物相比,更少有深睡不动的时候”,primates属于smart ones,因此更有可能深睡不动,B与此相悖;文中暗示无梦睡眠使低级动物更警觉,从而起到一定的保护作用,C正好与这种理解相反.因此也不正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2838015.html
相关试题推荐
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
随机试题
Whomostlikelywillattendthefair?[originaltext]Thisyear’scollegegraduate
Weshouldbe(consider)______ofthecomfortofoldpeople.consideratebe是系动词,后面要
成人上腹部CT检查前30分钟口服阳性对比剂的量是A.50~80ml B.100
下述哪项不是Crohn病常见的临床表现A.发热 B.脓血便 C.腹痛 D.
呼吸的反射性调节中,可将呼吸道内的异物或分泌物排出的有()。A.咳嗽反射 B
下列各项中,不属于槟榔主治病证的是A、疟疾 B、水肿 C、胆结石 D、食积
斑蝥米炒时,每100kg药物用米A.25kg B.5kg C.10kg
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
根据我国安全生产法,生产经营单位的主要负责人应承担的安全生产职责有( )。A.
依照《立法法》的规定,下列事项只能制定法律的是()。A.国家主权的事项 B.犯
最新回复
(
0
)