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
In almost all cases the soft parts of fossils are gone for ever but they were fitted around or within the hard parts. Many of th
In almost all cases the soft parts of fossils are gone for ever but they were fitted around or within the hard parts. Many of th
admin
2010-01-15
36
问题
In almost all cases the soft parts of fossils are gone for ever but they were fitted around or within the hard parts. Many of them also were attached to the hard parts and usually such attachments are visible as depressed or elevated areas, ridges, or grooves, smooth or rough patches on the hard parts. The muscles most important for the activities of the animal and most evident in the appearance of the living animal are those attached to the hard parts and possible to reconstruct from their attachments. Much can be learned about a vanished brain from the inside of the skull in which it was lodged.
Restoration of the external appearance of an extinct animal has little or no scientific value. It does not even help in inferring what the activities of the living animal were, how fast it could run, what its food was, or such other conclusions as are important for the history of life. However, what most people want to know about extinct animals is what they looked like when they were alive. Scientists also would like to know. Things like fossil shells present no great problem as a rule, because the hard parts are external when the animal is alive and the outer appearance is actually preserved in the fossils.
Animals in which the skeleton is internal present great problems of restoration, and honest restorers admit that they often have to use considerable guessing. The general shape and contours of the body are fixed by the skeleton and by muscles attached to the skeleton, but surface features, which may give the animal its really characteristic look, are seldom restorable with any real probability of accuracy. The present often helps to interpret the past. An extinct animal presumably looked more or less like its living relatives, if it has any. This, however, may be quite equivocal. For example, extinct members of the horse family are usually restored to look somewhat like the most familiar living horses—domestic horses and their closest wild relatives. It is, however, possible and even probable that many extinct horses were striped like zebras. Others probably had patterns no longer present in any living members of the family. If lions and tigers were extinct they would be restored to look exactly alike. No living elephants have much hair and mammoths, which are extinct elephants, would doubtlessly be restored as hairless if we did not happen to know that they had thick, woolly coats. We know this only because mammoths are so recently extinct that prehistoric men drew pictures of them and that the hide and hair have actually been found in a few specimens. For older extinct animals we have no such clues.
The reconstruction of a fossilized animal’s external appearance is considered necessary in order to______.
选项
A、satisfy popular curiosity
B、answer scientific questions
C、establish its activities
D、determine its eating habits
答案
A
解析
本题询问有关动物化石外表复原的目的。相关信息为文章第二段,关键语句为“However,what most people want to know about extinct animals is what they looked like when they were alive”。
转载请注明原文地址:https://kaotiyun.com/show/oTnK777K
0
专业英语四级
相关试题推荐
Let’sNotHideHealthCosts Weareawashinhealth-careproposals.PresidentBushhasone.SodoesCalifor
WhenTonyBlairwaselectedtoBritain’sHouseofCommonsin1983;hewasjust30,theLabourParty’syoungestM.P.Labourhad
A、Makesurehighschoolgraduatesmeetthehigheststandard.B、Getthosegraduationrateshigherandhigherandhigher.C、Reenga
(1)Whichwouldyouprefertobe:amedievalmonarchoramodernoffice-worker?Thekinghasarmiesofservants.Hewearsthe
PeoplewhogrewupinAmericaandWesternEuropehavebecomeusedtotheideathattheWestdominatestheworldeconomy.Inf
PeoplewhogrewupinAmericaandWesternEuropehavebecomeusedtotheideathattheWestdominatestheworldeconomy.Inf
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
A、Computers.B、Mobilephones.C、Farmingtechnology.D、A,BandCD细节题:选项A、B和C在对话中都出现过,但题目要求找出Hannah对“technology”一词的理解。对话中有这样一段话:
Thelittlegirlcouldnot______hertearswhenhermotherwasdressingthewound.
随机试题
化脓性关节炎患者关节内置管冲洗的护理措施。
流行性乙型脑炎的传染源,传播媒介,高峰季节和流行特点分别为
在海运提单的收货人栏内有“ORDER”字样的提单称之为()。
下列各项中,计提减值后其价值又得以恢复时可以转回的是()。
如果小张考试及格并且大田考试不及格,则小娜考试一定不及格。如果以上命题是真的,那么,再加上什么前提,可以得出结论:大田考试及格了。
民间通常所说的“鬼火”是化学中的()现象。
铁列平改革
阅读以下关于某嵌入式系统设计方案的叙述,回答问题1至问题3,将答案填入对应栏内。[说明]通常计算机按其体系结构分为冯·诺依曼(VonNeumann)结构和哈佛(Harvard)结构。冯·诺依曼结构,也称普林斯顿结构,是一种将程序指令存储器和数据
NewZealandgaineditsindependencein
ANiceCupofTeaTheLegendaryOriginsofTeaA)ThestoryofteabeganinancientChinaover5,000yearsago.Accordingto
最新回复
(
0
)