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
Scientists have determined that Archaeopteryx, the earliest known bird, was definitely birdbrained, meaning no disrespect. Indee
Scientists have determined that Archaeopteryx, the earliest known bird, was definitely birdbrained, meaning no disrespect. Indee
admin
2021-10-20
52
问题
Scientists have determined that Archaeopteryx, the earliest known bird, was definitely birdbrained, meaning no disrespect. Indeed, they consider the fossil’s brain size decisive evidence that Archaeopteryx had what it took to fly.
The new research suggests, moreover, that birds probably started flying millions of years earlier than scientists previously thought. It is jus that fossils of those first flying birds—predecessors of Archaeopteryx—have never been found.
The researchers, at the Natural History Museum in London, based their findings on the first X-ray examination and reconstruction of the braincase and inner ear of a 147-million-year-old Archaeopteryx specimen. They found that in size, shape and volume, its brain was similar to that of the modern eagle or sparrow.
Measurements of the semicircular canals, the mechanism for balance inside the ear, showed that Archaeopteryx had the "neurological and structural adaptations necessary for flight," the scientists concluded.
Their research, involving an X-ray computed tomography scan, or C.T., of the fossil’s braincase and inner ear, is described today in the journal Nature.
Previous studies of the feathered wing and tail of Archaeopteryx and its birdlike anatomy, including a pronounced wishbone, supported the prevailing view of experts that it was capable of some degree of powered flight. Archaeopteryx is considered a prime transitional species in the evolution of some reptiles, probably dinosaurs, into today’s birds.
But the research team, led by Dr. Angela Milner, a paleontologist at the British museum, wrote that until their investigation of Archaeopteryx, "little was understood about the extent to which its brain and special senses were adapted for flight."
Dr. Milner said the new study not only established that Archaeopteryx was capable of "controlling the complex business of flying," but also showed "how much there is still to discover about when and how bird flight began."
In a statement issued by the museum, Dr. Milner said, "If flight was this advanced by the time Archaeopteryx was around, then were birds actually flying millions of years earlier than we’d previously thought?"
The reason why there still needs improvement in the past view of Archaeopteryx is that _______.
选项
A、fossils of those earliest birds haven’t been discovered yet
B、the wishbone they studied is just so-called wishbone
C、there was no study of the role of its brain and some faculties in flight
D、Archaeopteryx is regarded as the earliest known bird
答案
C
解析
根据文章第7段可知过去并没有对始祖鸟的脑及其他一些感觉功能进行研究,所以,在这些方面还有待进一步的提高。因此,C为正确选项。
转载请注明原文地址:https://www.kaotiyun.com/show/BNtK777K
0
专业英语四级
相关试题推荐
Inspiteofalltheopposition,hisfamilywas______ofhisattempttobecomeasinger.
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemformostofthemisunderstandingsbetw
AllthefollowingsentencesdefinitelyindicatefuturetimeEXCEPT_____
Inthefaceofunexpecteddifficulties,hedemonstratedatalentforquick,______action.
Hisgreatest______ishisutterlynaturalandprofoundlygoodmusicalinstinct.
PASSAGETHREE
PASSAGEONEWhydidthegirlplaybasketballoverandoveragain?Whatcontributedtotheauthor’sfinalmasteringofthespeak
Janewasdeterminedto______herselfintheAfricanwayoflife.
Thermalexpansionofsolidis______detectedbyournakedeyes.
A.assistingB.estimatesC.shutoffD.manufacturersE.orallyF.invisibleG.sightlessH.sellersI.familiesJ.ascerta
随机试题
舌肌包括______和______两部分。
吡啶类的药物,可与下列哪些试剂反应或下列哪些方法鉴别
消风散的组成药物中含有
美蓝作为以下哪种毒物中毒的解毒剂
下列选项中对民事法律关系的表述正确的是()。
根据《建设项目竣工环境保护验收技术规范一生态影响类》,对水库建设项目,验收时应调查的生态影响环境保护措施有()。
从业人员在服务的过程中,坚持办事公道原则的做法包括()。
Ofthetwocoats,I’dchoosethe______onetosparesomemoneyforabook.
设A为n阶非零矩阵,E为n阶单位矩阵,若A3=O,则()
TheStudentUnionintheEnglishDepartmenttakespleasureinannouncingthata"GraduatesExperienceExchangeMeeting"istob
最新回复
(
0
)