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
70
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
(1)"Theworldisn’tflat,"writesEdwardGlaeser,"it’spaved."Atanyrate,mostoftheplaceswherepeopleprefertodwell
(1)Therewasmusicfrommyneighbor’shousethroughthesummernights.Inhisbluegardensmenandgirlscameandwentlikemo
TheWorldBank’sRealProblem TheWorldBankisundeniablyincrisis.Butnotbecauseitspresident,Paul
(1)Whichwouldyouprefertobe:amedievalmonarchoramodernoffice-worker?Thekinghasarmiesofservants.Hewearsthe
Inmanycountries,whenpeoplegivetheirname,theyrefertothemselvesusingtheirlastnameorfamilyname.IntheUnited
(1)Asachild,IlovedCharlieChaplinfilms.Iwouldputonmyfather’sshoesandwanderaboutwithatrampishgait.Luckily
Morethanfortythousandreaderstolduswhattheylookedforinclosefriendships,whatthe 【C1】______friends,whattheywere
HowmanymillionaireshaveStanleysurveyedbeforehewrotehisbook?
随机试题
口腔黏膜黑斑最常见于哪个部位
嵌顿性疝和绞窄性疝的区别主要在于()。
根据增值税的有关规定,下列关于成品油零售加油站的有关增值税规定,说法正确的有()。
某卡拉OK歌舞厅,本月门票收入50万元,台位费收入20万元,歌舞厅内设非独立核算柜台,销售烟、酒、饮料收入18万元,零售小食品5万元,当地规定的歌舞厅营业税税率为20%。该歌舞厅本月应缴纳的营业税为()。
关于坚持党的领导、人民民主与依法治国三者间的关系表述正确的有()。①党的领导是人民当家做主和依法治国的根本保证②人民民主与依法治国是相互促进的③依法治国必须坚持党的领导④三者是有机统一的
传统工艺是在民间生活中创造的,无论是趋利避害、吉祥祈福的装饰还是家居日常的物件,传统工艺与日常生活融为一体,无处不在。如今,生活从传统走向现代,生活方式发生了不小的变化,但我们仍然需要传承这样的生活艺术和生活智慧,复兴工艺文化的创造力,创作生活之美。在现代
“路漫漫其修远兮,吾将上下而求索”出自()。
根据我国选举法,由选民直接选举的人大代表候选人可通过选民联名推荐的方式产生。某甲欲通过此种方式参选人大代表,其须获得选民联名推荐的最低人数应是()。(2012年单选29)
根据我国《宪法》中行政区域划分的规定,省、自治区分为()。
—We’resureofwinningthematch.—______.We’llmeetourmatch.
最新回复
(
0
)