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
71
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
FiveCommonMistakesinConversationsandTheirSolutionsI.NotlisteningA.Problem:mostpeople【T1】________
ThroughouttheU.S.studentsaregettingouttheirNo.2pencils,readyendureastress-packedfourhoursofbubblinginanswers
AnyonebelievingtheglobaleconomiccrisistobeovershouldhavetakenalookaroundEuropethisweek.Desperatetorevivehis
AnyonebelievingtheglobaleconomiccrisistobeovershouldhavetakenalookaroundEuropethisweek.Desperatetorevivehis
A、7,000studentsdropoutofschooleveryyear.B、Fewstudentsleaveschoolwithoutadiploma.C、About1millionstudentsdropo
Inmanycountries,whenpeoplegivetheirname,theyrefertothemselvesusingtheirlastnameorfamilyname.IntheUnited
Inmanycountries,whenpeoplegivetheirname,theyrefertothemselvesusingtheirlastnameorfamilyname.IntheUnited
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
PassageTwo(1)It’sagoldenageforstudyinginequality.ThomasPiketty,aFrencheconomist,setthebenchmarkin2014wh
随机试题
肥厚型梗阻性心肌病药物治疗不宜用
气体燃烧根据在燃烧前可燃气体和氧的混合状况不同,其燃烧方式有()。
对于履行加工贸易合同中产生的剩余料件、边角料、残次品、副产品等,在海关规定的下列()方式中需要填制报关单向海关申报。
下列作品中,哪部属于我国20世纪60—70年代的现代京剧“革命样板戏”?()
下列叙述中错误的是()。
教育学的研究对象应是以“教育事实、教育现象和教育规律”为基础的。()
契税是以所有权发生转移变动的不动产为征税对象,向产权承受人征收的一种财产税,应缴税范围包括土地使用权出售、赠与和交换,房屋买卖,房屋赠与,房屋交换等。根据上述定义,下列不需要缴纳契税的是:
清政府设立海军衙门在()。
中国共产党在20世纪40年代前期开展的整风运动,被认为是“深刻影响二十世纪中国历史进程的重大事件,也是建国后历次政治运动的滥觞”,这场整风运动()
在考生文件夹下有一个工程文件sjt5.vbp。其功能是产生并显示一个数列的前n项。数列产生的规律是:数列的前2项是小于10的正整数,将此两数相乘,若乘积<10,则以此乘积作为数列的第3项;若乘积≥10,则以乘积的十位数为数列的第3项,以乘积的个位数为数列的
最新回复
(
0
)