37 Some believe that birds ___ from dinosaurs.A) involveB) evolveC) involvingD) evolving 相关知识点: 试题来源: 解析 B) evolve 该题考察动词的正确形式和词义。句子意为“一些人认为鸟类是从恐龙进化而来的”。选项中只有“evolve”表示“进化”,符合句意。因此,正确答案为 B) evolve。反馈...
The group of scientists who agree birds are descended from maniraptoran theropods has been rather cheekily dubbed the “Birds Are Dinosaurs Movement,” or BADM. On this account of the evolutionary history of birds, their closest ancient relatives would have been other maniraptoran theropods, like...
Based on their findings from fossil records, researchers say the emergence of birds some 150 million years ago was a gradual process, as some dinosaurs became ever-more bird-like over time. This makes it very difficult to draw a dividing line on the family tree between dinosaurs and birds. ...
shed light on the evolution of endothermy in birds and their theropod ancestors. Rezende et al. estimated the costs of evolving endothermy along the bird stem lineage using reconstructed ancestral body sizes, based on thefossil record. To quantify the energy costs within alternative ...
Yet once those avian features were in place, birds took off. Brusatte’s study of coelurosaurs found that once archaeopteryx and other ancient birds emerged, they began evolving much more rapidly than other dinosaurs. The hopeful monster theory had it almost exactly backwards: A burst of evolut...
possums do today could have allowed them to extend their range and chase other gliders while staying clear of dangers on the ground. When it came to evolving true aeronautical ability, they already had a head-start thanks to a suite of features they had inherited from their thero...
U. Texas professor says dinosaurs may have survived, evolving into birdsAmy Westerman
of dinosaur. But our bad luck was to find the other kind of dinosaur, and unfortunately it has a bird-like heart too. So this means that bird-like hearts may be typical of highly evolved, late-in-the-era, dinosaurs -- they were evolving, they were changing. (Quote by - Dale ...
DNAsequences fromfourslow- evolving genes (mitochondrial 12Sand16SrRNA,tRNAVaI, andnuclear a-enolase) nowprovide strong statistical support forabird-crocodillan relationship. Themajorgroups ofliving amniote vertebrates arethe mammals, birds, crocodilians, turtles, squamates (lizards, snakes, andamphisbae...
These Diatrymas replaced the predatory dinosaurs and dined on small mammals. Many species evolving from this Diatrymas, adapted to both land, salt water, and later even urbanized parts of the world. Some birds evolved as human food sources such as chicken and other game birds, others still ...