首页
登录
职称英语
Scientists have determined that Archaeopteryx, the earliest known bird, was
Scientists have determined that Archaeopteryx, the earliest known bird, was
游客
2024-08-30
8
管理
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?" [br] The author’s attitude towards the new research is _______.
选项
A、supporting
B、neutral
C、negative
D、critical
答案
B
解析
纵观全文,作者都在客观地陈述事实,没有添加任何个人感情色彩。所以,正确答案为B“中立的”。
转载请注明原文地址:https://tihaiku.com/zcyy/3736171.html
相关试题推荐
Janewasdeterminedto______herselfintheAfricanwayoflife.A、immerseB、dip
Spacescientistsbelievethattheblackholeis______,andwoulddraweverythin
Thescientistshaveabsolutefreedomastowhatresearchtheythinkisbestto_
Janewasdeterminedto______herselfintheAfricanwayoflife.A、immerseB、dip
Scientistshavebeencalculatingthelikelihoodofasmallplanetto______with
Jackisdeterminedtogetaseatfortheconcert______itmeansstandinginaque
(1)Theearliestcontroversiesabouttherelationshipbetweenphotographyand
(1)Theearliestcontroversiesabouttherelationshipbetweenphotographyand
(1)Theearliestcontroversiesabouttherelationshipbetweenphotographyand
Peoplehavebeenpaintingpicturesforatleast30,000years.Theearliestp
随机试题
Arecomfortshoesalwaysmorehealthful?Notnecessarily,accordingtosome
简述片剂质量评价内容。
A.1.5A B.0.5A C.-1.5A D.-0.5A
药品广告审批机关是A.省级工商管理部门 B.国家药品监督管理部门 C.国家工
患者女,50岁。确诊为宫颈癌,拟行经腹子宫全切术,术前准备措施中,不必要的是A.
梅某从社区安康家庭服务机构聘用了小陈到家中护理患精神病的母亲。根据《家庭服务业管
甲欠乙15万元,甲的朋友丙与乙签订了保证合同,此时丙自有财产12万元,后甲不能清
pz波函数角度分布的形状是:A.双球形 B.球形 C.四瓣梅花形 D.橄榄
费用索赔的计算方法中,()是根据索赔事件所造成的损失或成本增加,按费用项目
现浇施工水处理构筑物的构造特点有()A.断面较薄 B.配筋率较低 C.抗渗
最新回复
(
0
)