首页
登录
职称英语
Dinosaur expert: Some paleontologists have claimed that birds are descendants of
Dinosaur expert: Some paleontologists have claimed that birds are descendants of
游客
2024-01-13
33
管理
问题
Dinosaur expert: Some paleontologists have claimed that birds are descendants of a group of dinosaurs called dromeosaurs. They appeal to the fossil record, which indicates that dromeosaurs have characteristics more similar to birds than do most dinosaurs. But there is a fatal flaw in their argument: the earliest bird fossils that have been discovered date back tens of millions of years farther than the oldest known dromeosaur fossils. Thus the paleontologists’ claim is false. The expert’ s argument depends on assuming which one of the following?
选项
A、Having similar characteristics is not a sign that types of animals are evolutionary related.
B、Dromeosaurs and birds could have common ancestors.
C、Knowledge of dromeosaur fossils and the earliest bird fossils is complete.
D、Known fossils is indicate the relative dates of origin of birds and dromeosaurs.
E、Dromeosaurs are dissimilar to birds in many significant ways.
答案
D
解析
既然已发现最早的鸟类化石比已发现的最古老的dromeosaurs化石早几千万年,那么一定是最早的鸟类化石与最古老的dromeosaurs化石的相对日期已经确定,即已知化石揭示了鸟类和dromeosaurs起源的相对日期,因此(D)为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3358310.html
相关试题推荐
Paleontologistshypothesizethatmodernbirdsevolvedfromthefamilyofdinosau
Untilrecentlyexpertsbelievedthatenvironment,notgenetics,largelydetermin
ThewildmouflonsheepoftheislandofCorsicaaredirectdescendantsofsheep
Theskullsandpelvicbonesofsomespeciesofdinosaursharecharacteristicswi
Becausedinosaurswerereptiles,scientistsonceassumedthat,likeallreptiles
Itiscommonlyheldamongmarketingexpertsthatinanonexpandingmarketacomp
Dinosaurexpert:Somepaleontologistshaveclaimedthatbirdsaredescendantsof
Ahugeflyingreptilethatdiedoutwiththedinosaurssome65millionyearsago
CONNOISSEUR:EXPERTISE::A、benefactor:discretionB、amateur:obsessionC、zealot:in
CONNOISSEUR:EXPERTISE::A、benefactor:discretionB、amateur:obsessionC、zeal
随机试题
ChandiAkella
Muchofthediscussionofenvironmentalproblemsinthepopularpressleavesthe
个人汽车贷款业务中,合作机构担保风险来自于( )。A.汽车经销商方面 B.专
2014年A公司财务报表的部分信息如下:净利润300万元,销售收入2000万元,
患者,女,48岁。反复双手近端指间关节、膝关节痛伴晨僵2年,肘部伸侧可触及皮下结
口服抗凝药物时,国人的INR值应维持在()A.1.0-2.0 B.2
患者男性,60岁。膀胱结石术后康复出院。护士叮嘱到:“您回家多休息和按时服药,注
十字路口的交通信号灯每分钟红灯亮30秒、绿灯亮25秒,黄灯亮5秒。当你抬头看信号
A.味淡、微酸,嚼之发黏 B.气微,味微甜,嚼之微有豆腥气 C.气微,味稍甜
关于最高投标限价的编制,下列说法正确的是()。A.国有企业的建设工程招标可以不
最新回复
(
0
)