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
The evolution of intelligence among early large mammals of the grasslands was due in great measure to the interaction between tw
The evolution of intelligence among early large mammals of the grasslands was due in great measure to the interaction between tw
admin
2014-09-12
30
问题
The evolution of intelligence among early large mammals of the grasslands was due in great measure to the interaction between two ecologically synchronized groups of these animals, the hunting carnivores and the herbivores that they hunted. The inter-
line action resulting from the differences between predator and prey led to a general
5 improvement in brain functions; however, certain components of intelligence were improved far more than others.
The kind of intelligence favored by the interplay of increasingly smarter catchers and increasingly keener escapers is defined by attention—that aspect of mind carrying consciousness forward from one moment to the next. It ranges from a passive, free-
10 floating awareness to a highly focused, active fixation. The range through these states is mediated by the arousal system, a network of tracts converging from sensory systems to integrating centers in the brain stem. From the more relaxed to the more vigorous levels, sensitivity to novelty is increased. The organism is more awake, more vigilant; this increased vigilance results in the apprehension of ever more subtle signals as the
15 organism becomes more sensitive to its surroundings. The processes of arousal and concentration give attention its direction. Arousal is at first general, with a flooding of impulses in the brain stem; then gradually the activation is channeled. Thus begins concentration, the holding of consistent images. One meaning of intelligence is the way in which these images and other alertly searched information are used in the context of
20 previous experience. Consciousness links past attention to the present and permits the integration of details with perceived ends and purposes.
The elements of intelligence and consciousness come together marvelously to produce different styles in predator and prey. Herbivores and carnivores develop different kinds of attention related to escaping or chasing. Although in both kinds of animal,
25 arousal stimulates the production of adrenaline and norepinephrine by the adrenal glands, the effect in herbivores is primarily fear, whereas in carnivores the effect is primarily aggression. For both, arousal attunes the animal to what is ahead. Perhaps it does not experience forethought as we know it, but the animal does experience something like it. The predator is searchingly aggressive, inner-directed, tuned by the
30 nervous system and the adrenal hormones, but aware in a sense closer to human consciousness than, say, a hungry lizard’s instinctive snap at a passing beetle. Using past events as a framework, the large mammal predator is working out a relationship between movement and food, sensitive to possibilities in cold trails and distant sounds —and yesterdays unforgotten lessons. The herbivore prey is of a different mind. Its
35 mood of wariness rather than searching and its attitude of general expectancy instead of anticipating are silk-thin veils of tranquillity over an explosive endocrine system.
It can be inferred from the passage that in animals less intelligent than the mammals discussed in the passage
选项
A、past experience is less helpful in ensuring survival
B、attention is more highly focused
C、muscular coordination is less highly developed
D、there is less need for competition among species
E、environment is more important in establishing the proper ratio of prey to predator
答案
A
解析
Choice A is correct. In lines 18-20, the author defines intelligence in terms of an animal’s use of past experience. In the context of the entire passage, it can be inferred that more intelligent animals, such as the grassland mammals discussed, are better able to use past experience to help them survive than less intelligent animals are. Choice B is incorrect. The second paragraph of the passage indicates that attention is more highly focused in animals of greater, rather than less, intelligence. Choices C, D, and E are incorrect. The author does not discuss muscular coordination as an element in intelligence, gives no indication that in less intelligent species there is less need for competition, and does not discuss how a proper ratio of prey to predator is established.
转载请注明原文地址:https://kaotiyun.com/show/MyjO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
______studentwithalittlecommonsenseshouldbeabletoanswerthequestion.
Weallknowthatitispossibleforordinarypeopletomaketheirhomesontheequator,althoughoftentheymayfeeluncomfortab
Theoldideathatchildprodigies"burnthemselves"or"overtaxtheirbrains"intheearlyyears,therefore,arepreytofailure
Incollege,Iencounteredaruleofthumb:Foreverycredithourperweek,youshouldbestudyingtwotothreehours【C1】________
Hedidn’tgointodetailsonthesubject,butjustspoke________.
Asabusinesswoman,Icaredeeplyaboutmycustomers.Butlikeanyoneforwhomyoufeelaffection,【C1】________canalsodriveyou
Thefollowingquestionspresentasentence,partofwhichorallofwhichisunderlined.Beneaththesentenceyouwillfindfive
Thedirectorofasecondaryschoolwheremanystudentswerehavingsevereacademicproblemsimpaneledacommitteetostudythem
Dormitoriesrangefromtwotosixstoriesinheight.Ifadormitoryroomisabovethesecondfloor,ithasafireescape.Ifthe
A、agradualmovementfromtheideaofgenderlesswritingtoawritingthatoriginatesinthewoman’sbodyB、ashiftbetweenadve
随机试题
代议机关行使国家的________,在议行合一体制中属于国家最高权力机关。()
现代金融业已经转变为信息服务型企业,决定效益的关键因素将是金融业对_______的应用能力。()
Theoutputofourcompanythismonthis______thatoflastmonth.
调节内脏、血管、竖毛肌活动的神经是___________;
A.细胞内液B.细胞外液C.细胞外液和细胞内液D.组织液E.血浆内环境是指
渗出液的特点有()
同圆公司与乙公司150万元货款纠纷一案,经区法院审理后判决责令乙公司向同圆公司支付140万元货款。双方均未上诉。因乙公司拒绝支付货款,同圆公司向区法院申请强制执行。在执行过程中,同圆公司与乙公司达成由乙公司的到期债务人丙公司直接向同圆公司支付135万元的和
在所得税的计算中,属于不征税收入的是()。
已知一个四位数加上它的各位数字之和后等于2012,则所有这样的四位数之和为()。
Somesayitisevidentthatcomputerscandamageaperson’seyesight.Sincethepopularityofcomputersbegantoskyrocket,ther
最新回复
(
0
)