| 单词 | jawless |
| 例句 | His upper lip smiled, but Starnes's jawless chin couldn't follow suit. An Abundance of Katherines 2006-09-21T00:00:00Z First, there’s Andrea, our would-be negotiator who travels the perilous route to the prison with an armless, jawless walker to gauge Rick’s intentions. The Walking Dead Watch: Hey, Judas 2013-02-25T20:07:50Z But from her cinematic entrance to the quick scenes that showcased her prowess in this world, we never knew her name, nor did we know why the hell she dragged armless, jawless walkers on chains. The Walking Dead Watch: The Governor Commeth 2012-10-29T14:54:06Z By comparing this feature in the jawed fish fossil with the brain case features of their precursors, the jawless fish, he and the team discovered new ways the two could be compared. How the fish got its shoulder 2023-11-01T04:00:00Z About 500 million years ago, vertebrates were jawless marine creatures with tails but no paired fins, and numerous, paired gill arches. Where did shoulders come from? Ancient fish reveal joint’s evolution 2023-11-01T04:00:00Z These jawless, eel-like creatures have suctioning discs lined with teeth for mouths, which many modern species use to latch on to prey and suck blood from their living hosts. This 160-million-year-old fish gouged out its victims’ flesh 2023-10-31T04:00:00Z This ancient fish had separated, independent cartilages encasing the brain, rather than the solid bone or cartilage structure of jawless and jawed fish that followed it. Prehistoric fish fills 100 million year gap in evolution of the skull 2023-09-20T04:00:00Z Evolution of the jaw and paired fins permitted gnathostomes to expand from the sedentary suspension feeding of jawless fishes to become mobile predators. Fundamentals of Biology 2015-01-01T00:00:00Z While most jawless fish have 5-20 gill arches, jawed fish almost never have more than five. How the fish got its shoulder 2023-11-01T04:00:00Z They found that same landmark in another group of extinct fish, the jawless Osteostracans. Where did shoulders come from? Ancient fish reveal joint’s evolution 2023-11-01T04:00:00Z The earliest vertebrates that diverged from the invertebrate chordates were the jawless fishes. Concepts of Biology 2013-04-25T00:00:00Z While McCoy still thinks the Tully Monster was related to jawless fish, she is intrigued by the new study’s findings. Was the Tully Monster a Fish, a Worm, a Giant Slug with Fangs? 2023-04-19T04:00:00Z The ability of gnathostomes to exploit new nutrient sources likely is one reason that they replaced most jawless fishes during the Devonian period. Fundamentals of Biology 2015-01-01T00:00:00Z Intriguingly, the blood supply to the fins of jawless fishes emerges between the sixth and seventh gill arches. How the fish got its shoulder 2023-11-01T04:00:00Z Lampreys are a jawless fish, older than dinosaurs, that look like their distant relative, the eel, according to the state Department of Fish and Wildlife. Don’t eat too many of these Columbia River fish, WA officials say 2023-03-23T04:00:00Z Ostracoderms, now extinct, were vertebrate fishes encased in bony armor, unlike present-day jawless fishes, which lack bone in their scales. Concepts of Biology 2013-04-25T00:00:00Z In recent years paleontologists have even connected the Tully Monster to jawless fish such as lampreys, which have a backbonelike structure. Was the Tully Monster a Fish, a Worm, a Giant Slug with Fangs? 2023-04-19T04:00:00Z Ostracoderms were vertebrate fishes encased in bony armor, unlike present-day jawless fishes, which lack bone in their scales. Fundamentals of Biology 2015-01-01T00:00:00Z They include ancient groups like jawless fish, lineages of early jawed fish called placoderms, ascendant newcomers like cartilaginous and bony fish and the first fishes to hop onto land. Fossilized Fish Reveal Earliest Known Prequel of ‘Jaws’ 2022-09-28T04:00:00Z A well-preserved jawless fish offers clues to how ancient fins evolved into arms and legs. Fish fossil catch from China includes oldest teeth ever 2022-09-28T04:00:00Z Fishes were the earliest vertebrates, and jawless fishes were the earliest of these. Concepts of Biology 2013-04-25T00:00:00Z “But they have a number of features that are very similar to jawless fish, like complex eyes and cartilaginous vertebrae.” Was the Tully Monster a Fish, a Worm, a Giant Slug with Fangs? 2023-04-19T04:00:00Z Renal portal systems are present in all other vertebrates except jawless fishes. Fundamentals of Biology 2015-01-01T00:00:00Z Philip Donoghue, a paleontologist at the University of Bristol and an author on one of the papers, says the most remarkable specimen from the site is a jawless fish called Tujiaaspis vividus. Fossilized Fish Reveal Earliest Known Prequel of ‘Jaws’ 2022-09-28T04:00:00Z These features are shared by all living jawed vertebrates, but are absent or achieved in a different way in jawless vertebrates, whose haemoglobin proteins are of more ancient origin. Extinct proteins resurrected to reconstruct the evolution of vertebrate haemoglobin 2020-05-19T04:00:00Z The evolution of jaws allowed early gnathostomes to exploit food resources that were unavailable to jawless fishes. Concepts of Biology 2013-04-25T00:00:00Z Some believe the form of hagfish suggests similar creatures belong near the base of that tree, with jawless creatures called lampreys, armoured fish, and other vertebrates evolving as time went on. 'Like finding a sneeze': fossil identified as 100m-year-old hagfish 2019-01-21T05:00:00Z Fishes were the earliest vertebrates, with jawless species being the earliest and jawed species evolving later. Fundamentals of Biology 2015-01-01T00:00:00Z Previously, researchers believed the two sets of fins evolved separately between jawless and jawed fish. Fossilized Fish Reveal Earliest Known Prequel of ‘Jaws’ 2022-09-28T04:00:00Z Hagfish are jawless, eel-like creatures that are known to spray huge quantities of goo when attacked. These eel-like creatures use their flaccid, squishy skin to survive shark attacks 2017-12-15T05:00:00Z Lampreys and other jawless fish also branched off from the vertebrate family tree early in evolutionary history, notes Margaret Docker, an evolutionary biologist at the University of Manitoba in Winnipeg, Canada. Growth spurts may determine a lamprey's sex 2017-03-28T04:00:00Z They found that most of the gill tissue developed from the endoderm — as it does in jawless vertebrates. Evolution: Origin of vertebrate gills : Nature : Nature Research 2017-02-21T05:00:00Z Such is not the case for the hagfish, a jawless, eellike creature that ties itself into pretzellike twists to tear apart its dinner. How the slimy hagfish ties itself up in knots—and survives shark attacks 2017-01-06T05:00:00Z The few known fish from that period are jawless and generally unprepossessing, Dr. Coates said. Fossilized Fish Reveal Earliest Known Prequel of ‘Jaws’ 2022-09-28T04:00:00Z Fish were Earth's first vertebrates when they appeared more than half a billion years ago, but they were primitive and jawless, with sucker-like mouths. Smart mouth: Chinese fish fossil sheds light on jaw evolution 2016-10-20T04:00:00Z So the Tully's closest relative is probably the modern lamprey, a jawless fish that hangs onto the sides of other bigger fish and rasps away at their skin. The Verge Review of Animals: the Tully monster 2016-03-20T04:00:00Z They analyzed numerous fossils of the creature, named Tullimonstrum gregarium, and determined it was not a segmented worm or a free-swimming slug, as once hypothesized, but rather a type of jawless fish called a lamprey. What is a Tully Monster? Scientists finally provide an answer 2016-03-16T04:00:00Z While the primeval oceans were teeming with life including jawless fish, arthropods, squid relatives, jellyfish and more, the land was barren and void. Wondrous fungus: fossils are oldest of any land-dwelling organism 2016-03-02T05:00:00Z The jawless, gray fish are a traditional food source for tribal members in the Columbia River Basin, which stretches from the Oregon coast to Canada and into Idaho, Montana and Washington. Native American tribes start yearly harvest of eel-like fish 2015-06-12T04:00:00Z The jawless, gray fish are a traditional food source for tribal members in the Columbia River Basin. Native American tribes start yearly harvest of eel-like fish 2015-06-12T04:00:00Z Go back far enough in your family tree — before placoderms — and your ancestors were rather ugly jawless fish who reproduced through external fertilization, in which sperm and eggs are expelled into the water to unite. Fossils rewrite history of penetrative sex 2014-10-18T04:00:00Z A tiny jawless fish that lived more than half a billion years ago is providing scientists with a treasure trove of information about the very dawn of vertebrate life on Earth. Tiny ancient fish unlocks secrets of Earth's early vertebrates 2014-06-11T04:00:00Z While people in Europe eat sea lampreys, there’s no market for the jawless fish here - nor should there be one, Twohey said. Crews to survey St. Clair River for sea lampreys 2014-05-15T04:00:00Z The emergence of gnathostomes from jawless vertebrates marks a major event in the evolution of vertebrates. Elephant shark genome provides unique insights into gnathostome evolution 2014-01-08T18:21:42.027Z By now, only two types of fish are jawless — lampreys and hagfish. Observatory: Simpler Fish Held On Long Past Jaws? Arrival 2011-07-12T00:21:28Z Some of these distant relatives later gave rise to the jawless fish called lampreys that lurk in seas today and still use this method of reproduction. Fossils rewrite history of penetrative sex 2014-10-18T04:00:00Z Still, jawless fish carried on, perhaps because they were not competing for the same resources. Observatory: Jawless Fish Held Their Own Long After Being Upstaged 2011-07-06T19:05:42Z The jawless bum shrugged up his shoulders, joined his hands, and by signs begged his pardon; for speak he could not. Gargantua and Pantagruel, Illustrated, Book 4 Among vertebrates, the earliest mineralized tissue was found in the feeding apparatus of extinct jawless fishes, the conodonts. Elephant shark genome provides unique insights into gnathostome evolution 2014-01-08T18:21:42.027Z I myself am one of them, jawless, broken, hideous to behold. Smith and the Pharaohs, and other Tales The animal is probably to be placed with the jawless lampreys and hags,—a group too low to be included among true fishes. The Elements of Geology By now, only two species are jawless — lampreys and hagfish. Observatory: Jawless Fish Held Their Own Long After Being Upstaged 2011-07-06T19:05:42Z |
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