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]
Among th vertebrates, the ubiquitous birds are the epitome of flying. The Archaeopteryx – considered a classic "missing link" in evolutionary theory – and its immediate ancestors may be taken as the starting point o all bird life 200 million years ago. Since then, birds have been flying, ...
Understanding the aerodynamic performance of feathered, non-avialan dinosaurs is critical to reconstructing the evolution of bird flight. Here we show that the Early Cretaceous five-winged paravianMicroraptoris most stable when gliding at high-lift coefficients (low lift/drag ratios). Wind tunnel expe...
解析 1. course 2. crowded 第一句话描述的是进化过程中鸟类失去飞行能力,根据首字母提示和语境,"course"最符合,表示“过程”。第二句话描述街道上车辆拥挤,根据首字母提示和语境,"crowded"最符合,表示“拥挤的”。因此,答案为:course;crowded。反馈 收藏 ...
for the following downstroke. This reinterpretation of the primary function of the SC provides insight into the selective advantage of its unique musculoskeletal organization in the evolution of powered flapping flight in birds. The m. pectoralis has been removed, as well as all other wing and ...
April 1, 1962 1min read The Soaring Flight of Birds The effortless circling flight of vultures and similar birds depends on their aerodynamic efficiency and a meteorological phenomenon: air currents in thermal cells powered by the sun ByClarence D. Cone Jr. ...
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
2. 进化(evolution) 对于进化方面就是鸟类的翅膀(wing)了,有的认为为了飞行(flight)而进化,有的认为是为了隔热(heat insulation)和给身体保暖(thermal)而进化(evolve)。 3. 飞行(flight) 鸟类能够飞行的原因主要有以下: ①鸟类身体...
The Genius of Birds FLIGHT: The Genius of Birdsmarks the launch of Illustra Media’s new documentary seriesThe Design of Life.Each episode explores a different realm of the animal kingdom and the remarkable biological systems that make life on Earth possible. ...
On the other hand, in the course of the evolution of birds from reptiles, there was a succession of changes in the bone, muscle, and skin structures of the animals. This wholesale restructuring of some reptiles over a period of thousands of years equipped the new animals to escape their ...