THE most recent evidence to shed light on the evolution of flight in birds is described by Sanz et al. on page 442 of this issue — their remarkable discovery of the first example of a preserved alula, or bastard wing, in a 125-million-year-old bird from the Lower Cretaceous of Spain...
Aerial Righting, Directed Aerial Descent, and Maneuvering in the Evolution of Flight in Birds Evangelista, Dennis Jose. University of California, Berkeley ProQuest Dissertations & Theses, 2013. 3593829. ProQuest, part of Clarivate 关于ProQuest 联系我们 条款与条件 隐私政策 Cookie 隐私...
aAerial Righting, Directed Aerial Descent, and Maneuvering in the Evolution of Flight in Birds 空中纠正,被指挥的空中下降和操纵在飞行的演变在鸟[translate]
Voted Best Book of 2002 by Readers of Prehistoric Times Magazine Dinosaurs of the The Evolution and Loss of Flight in Dinosaurs and Birds presents the most recent work of renowned evolutionary scientist and dinosaur illustrator Gregory Paul. Dinosaurs of the Air synthesizes the growing body of evid...
3. 飞行(flight) 鸟类能够飞行的原因主要有以下: ①鸟类身体的羽毛(feather),和它流线型(streamline)的外形(appearance)为飞行增加了有利条件(favorable condition); ②鸟类的骨头(bone)是空心的(hollow),它头部和身体特殊的骨骼结构(...
The evolution of flight in birds. This interactive module for grades 9–12 examines evidence from the fossil record, behavior, biomechanics, and cladistic analysis to interpret the sequence of events that led to flight in the dinosaur lineage. http://www.ucmp.berkeley.edu/education/explorations/...
相关知识点: 试题来源: 解析 答案见上6.解析:evolution 考查名词。句意:在进化的过程中,一些鸟丧失 了飞行能力。空格前of为介词,空后没有其他形式的宾语,所以空 处应用名词形式。evolve(进化)的名词形式为evolution。故填c- volution。 反馈 收藏
In recent years, new fossil discoveries have changed our view of the early evolution of birds and, more critically, their powers of flight. We now know about a number of small-bodied dinosaurs that had feathers on their wings as well as on their legs and tails: completely unique in the ...
Bones have been subjected to considerable selective pressure throughout vertebrate evolution, such as occurred during the adaptations associated with the development of powered flight. Powered flight evolved independently in two extant clades of vertebrates, birds and bats. While this trait provided advanta...
The asymmetrical flight feathers of their wings are among the most distinctive features of living birds. But how are these feathers actually constructed, and when did they first appear in evolutionary history? New Yale research,published February 11 in Proceedings of the Royal Society B, found subt...