首页
登录
职称英语
Paleontologists hypothesize that modern birds evolved from the family of dinosau
Paleontologists hypothesize that modern birds evolved from the family of dinosau
游客
2025-02-26
26
管理
问题
Paleontologists hypothesize that modern birds evolved from the family of dinosaurs that included Tyrannosaurus rex. This hypothesis would be strongly supported if evidence that dinosaurs from this family had a body covering resembling feathers could be found, but so far no such evidence has been found. Which of the following, if true, would most help the paleontologists explain why no evidence of feathered dinosaurs has yet been found?
选项
A、Fossilized dinosaurs have shown many birdlike characteristics, such as bone structure and winglike arms.
B、If birds are in fact the descendants of dinosaurs, then it can be argued that the dinosaurs never really died out.
C、Flying dinosaurs such as the Pteranodon, which is not thought to have been related to modern birds, do not appear to have had feathers.
D、Soft tissues such as skin and feathers do not fossilize like bones, and therefore are far less likely to have left permanent evidence in the fossil record.
E、The thousands of dinosaur fossils excavated by paleontologists represent only a tiny fraction of the billions of dinosaurs that once lived.
答案
D
解析
D provides an answer for the question of why, if feathered dinosaurs did exist, no evidence of their feathers has ever been found. Answer E also provides a partial answer--that the fossil record of dinosaurs is incomplete--but it is a weaker answer than D because it does not directly address the question of feathers.
转载请注明原文地址:https://tihaiku.com/zcyy/3974146.html
相关试题推荐
Paleontologistshypothesizethatmodernbirdsevolvedfromthefamilyofdinosau
Ithasbeenhypothesizedthatmuchofthematterintheuniverseis"dark,"i.e
Theskullsandpelvicbonesofsomespeciesofdinosaursharecharacteristicswi
Becausedinosaurswerereptiles,scientistsonceassumedthat,likeallreptiles
Dinosaurexpert:Somepaleontologistshaveclaimedthatbirdsaredescendantsof
ManywritersofmodernEnglishhaveacquiredcarelesshabitsthatdamagethecla
Intendedprimarilytostimulatefamilysummertravel,thenewairfare,whichall
BasedonthegrowthratesoflargemodernreptilessuchastheGalapagostortois
NowhereinPraktaistheinfluenceofmodernEuropeanarchitecturemoreapparent
Themodernizationprogramforthesteelmillwillcostapproximately51million
随机试题
Severalyearsago,webeganconstructiononanewchurchbuilding.Intheb
在不同网络之间实现数据帧的存储转发,并在数据链路层进行协议转换的网络互连器称为(
审计师在审查退休福利计划后确定,过去10年中,退休金和医疗福利已变化多次。审计师
关于规划许可证的说法,正确的是()。A:在乡村规划区内进行公益事业建设,无须办
2、对某桩径D=1200mm的桩使用超声透射法检测基桩完整性,回答以下问题。88
男,50岁,肝硬化失代偿2年,2天前因呕血伴黑粪入院,经积极治疗出血停止,近1天
患者,男性,30岁,高热待查,体温39.8℃,遵医嘱行乙醇拭浴降温。常用的乙醇浓
1.题目:归因方式 2.内容: 3.基本要求: (1)试讲时间控制在
腹股沟直疝与斜疝最主要的鉴别之处是A.疝块的形状 B.发病的年龄 C.嵌顿的
适用管径800mm的不开槽施工方法有( )。A.盾构法 B.定向钻法 C.密
最新回复
(
0
)