英语词汇“ratite”造句的方法、技巧、例句及翻译-英语例句辞典

Later many groups evolved with reduced wings, such as ratites, penguins, and many island species of birds. Fundamentals of Biology 2015-01-01T00:00:00Z

Another study7 investigated a different basis for flight loss in ratites — a group of birds that includes the cassowary, ostrich and kiwi, and in which flight was lost multiple times in the deep past. Genomic mechanisms for the evolution of flightlessness in steamer ducks 2019-07-30T04:00:00Z

It was a ratite, a flightless bird of the same family as emus and ostriches, belonging to a group appropriately called elephant birds. New Titleholder For the Largest Bird of All Time 2018-09-30T04:00:00Z

At one point, researchers believed that D. stirtoni was related to other flightless ratites, like emus and ostriches. The Biggest Bird That Ever Lived and 5 More Bird Superstars 2018-05-15T04:00:00Z

Weird Animal Question of the Week decided to explore the whole group to which those birds belong, the flightless ratites. World’s Biggest Birds Are Stellar Dads and Unusual Lovers

However, not all ratites are big; smaller ones include the chicken-sized kiwi. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z

For over a century, ratites have posed a kind of biological jigsaw puzzle. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

Because ducks, ratites and other species all use a lymphatic system, the study shows that it must have been present in the common ancestor of all birds. Ostrich Penis Clears Up Evolutionary Mystery 2011-12-08T20:45:01.940Z

But in all ratites aside from ostriches, only the male cares for the offspring. World’s Biggest Birds Are Stellar Dads and Unusual Lovers

So ratites rely on another survival strategy: getting really big so fewer things can eat them. World’s Biggest Birds Are Stellar Dads and Unusual Lovers

This suggests that the African ostrich and the Madagascan elephant birds are the oldest branches of the ratite family tree. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z

These birds, called ratites, are distinguished from other birds not just by their lack of flight, but also by the distinctive arrangement of bones in their head. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

Ostriches and emus are members of the ratites, a group of flightless birds that also includes rheas and kiwis. Ostrich Penis Clears Up Evolutionary Mystery 2011-12-08T20:45:01.940Z

The researchers estimate the ancestors of modern ratites dispersed around the world roughly 65 million years ago, around the time of the mass extinction that killed off the dinosaurs. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z

The ratites include African ostriches and emus, cassowaries, and kiwis, all of the South Pacific and greater and lesser rheas of South America. World’s Biggest Birds Are Stellar Dads and Unusual Lovers

The new study suggests that ratites did not evolve from populations of a common flightless ancestor that were separated by continental drift. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z

Another giant ratite, the moa, lived on New Zealand until about 600 years ago. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

The largest species of flightless birds alive today are called the ratites, and include the ostrich, emu and rhea. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z

In 2008, Oliver Haddrath of the Royal Ontario Museum and his colleagues compared the moa DNA to those of other ratites and got a surprise. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

All ratites lack a keel, or an extension of the breastbone where flight muscles attach, says Rebecca Kimball, an evolutionary biologist at the University of Florida. World’s Biggest Birds Are Stellar Dads and Unusual Lovers

"Interestingly, lithornithid fossils are known from Europe and North America, places where we don't find ratites today, which is evidence that they were a widespread and highly mobile group." Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z

Those pieces carried away the flightless ratites that lived on them. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

That date poses a serious problem to the idea that ratites have been flightless since the days of Gondwana. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

These findings have led Dr. Cooper and his colleagues to propose a new hypothesis for how ratites evolved. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

In many ratites, males are responsible for child care. World’s Biggest Birds Are Stellar Dads and Unusual Lovers

It remains a mystery why these lineages of flying ratites all independently became flightless birds. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z

Africa’s ratites — ostriches — are the first lineage to have split from other ratites. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

Between 65 and 50 million years ago, early ratites flew across much of the world, finding new homes where they could settle. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

In at least six instances, Dr. Cooper argues, ratites evolved, losing their wings and becoming plant-eating birds. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z

单词	ratite
例句	ratite Later many groups evolved with reduced wings, such as ratites, penguins, and many island species of birds. Fundamentals of Biology 2015-01-01T00:00:00Z Another study7 investigated a different basis for flight loss in ratites — a group of birds that includes the cassowary, ostrich and kiwi, and in which flight was lost multiple times in the deep past. Genomic mechanisms for the evolution of flightlessness in steamer ducks 2019-07-30T04:00:00Z It was a ratite, a flightless bird of the same family as emus and ostriches, belonging to a group appropriately called elephant birds. New Titleholder For the Largest Bird of All Time 2018-09-30T04:00:00Z At one point, researchers believed that D. stirtoni was related to other flightless ratites, like emus and ostriches. The Biggest Bird That Ever Lived and 5 More Bird Superstars 2018-05-15T04:00:00Z Weird Animal Question of the Week decided to explore the whole group to which those birds belong, the flightless ratites. World’s Biggest Birds Are Stellar Dads and Unusual Lovers However, not all ratites are big; smaller ones include the chicken-sized kiwi. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z For over a century, ratites have posed a kind of biological jigsaw puzzle. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z Because ducks, ratites and other species all use a lymphatic system, the study shows that it must have been present in the common ancestor of all birds. Ostrich Penis Clears Up Evolutionary Mystery 2011-12-08T20:45:01.940Z But in all ratites aside from ostriches, only the male cares for the offspring. World’s Biggest Birds Are Stellar Dads and Unusual Lovers So ratites rely on another survival strategy: getting really big so fewer things can eat them. World’s Biggest Birds Are Stellar Dads and Unusual Lovers This suggests that the African ostrich and the Madagascan elephant birds are the oldest branches of the ratite family tree. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z These birds, called ratites, are distinguished from other birds not just by their lack of flight, but also by the distinctive arrangement of bones in their head. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z Ostriches and emus are members of the ratites, a group of flightless birds that also includes rheas and kiwis. Ostrich Penis Clears Up Evolutionary Mystery 2011-12-08T20:45:01.940Z The researchers estimate the ancestors of modern ratites dispersed around the world roughly 65 million years ago, around the time of the mass extinction that killed off the dinosaurs. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z The ratites include African ostriches and emus, cassowaries, and kiwis, all of the South Pacific and greater and lesser rheas of South America. World’s Biggest Birds Are Stellar Dads and Unusual Lovers The new study suggests that ratites did not evolve from populations of a common flightless ancestor that were separated by continental drift. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z Another giant ratite, the moa, lived on New Zealand until about 600 years ago. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z The largest species of flightless birds alive today are called the ratites, and include the ostrich, emu and rhea. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z In 2008, Oliver Haddrath of the Royal Ontario Museum and his colleagues compared the moa DNA to those of other ratites and got a surprise. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z All ratites lack a keel, or an extension of the breastbone where flight muscles attach, says Rebecca Kimball, an evolutionary biologist at the University of Florida. World’s Biggest Birds Are Stellar Dads and Unusual Lovers "Interestingly, lithornithid fossils are known from Europe and North America, places where we don't find ratites today, which is evidence that they were a widespread and highly mobile group." Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z Those pieces carried away the flightless ratites that lived on them. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z That date poses a serious problem to the idea that ratites have been flightless since the days of Gondwana. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z These findings have led Dr. Cooper and his colleagues to propose a new hypothesis for how ratites evolved. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z In many ratites, males are responsible for child care. World’s Biggest Birds Are Stellar Dads and Unusual Lovers It remains a mystery why these lineages of flying ratites all independently became flightless birds. Tiny Kiwi and Giant Elephant Bird Are Close Cousins 2014-05-27T04:00:00Z Africa’s ratites — ostriches — are the first lineage to have split from other ratites. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z Between 65 and 50 million years ago, early ratites flew across much of the world, finding new homes where they could settle. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z In at least six instances, Dr. Cooper argues, ratites evolved, losing their wings and becoming plant-eating birds. A Theory on How Flightless Birds Spread Across the World: They Flew There 2014-05-22T04:00:00Z
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