| 单词 | monotreme |
| 例句 | Platypus and echidnas are monotremes, the only mammals that lay eggs instead of giving birth to live young. Platypus milk: unlikely weapon in fight against superbugs 2018-03-15T04:00:00Z This echidna species is so special because it is one of only five remaining species of monotremes, the sole guardians of this remarkable branch of the tree of life. Found at last: Bizarre, egg-laying mammal finally rediscovered after 60 years 2023-11-09T05:00:00Z In that paper, they argued that monotremes belong to a separate branch of the mammalian evolutionary tree. Fossils Where They Don’t Belong? Maybe We Just Didn’t Look Hard Enough. 2023-07-16T04:00:00Z Marsupials and monotremes collectively account for about 56% of native terrestrial mammals in Australia. Fundamentals of Biology 2015-01-01T00:00:00Z There are three groups of mammals living today: monotremes, marsupials, and eutherians. Concepts of Biology 2013-04-25T00:00:00Z The findings, detailed in 11 studies published in the journal Science, involved placentals, by far the world's most common mammalian assemblage, known for giving birth to well-developed babies, and not egg-laying monotremes or pouched marsupials. Ambitious genome project shows how humans fit with other mammals 2023-04-27T04:00:00Z The reason it appears so unlike other mammals is because it is a member of the monotremes -- an egg-laying group that separated from the rest of the mammal tree-of-life about 200 million years ago.' Found at last: Bizarre, egg-laying mammal finally rediscovered after 60 years 2023-11-09T05:00:00Z “The monotremes have nothing to do with other modern mammals at all,” he said. Fossils Where They Don’t Belong? Maybe We Just Didn’t Look Hard Enough. 2023-07-16T04:00:00Z These groups are divided into two clades: the eutherians and marsupials comprise the clade of therian mammals, and monotremes form their sister clade. Fundamentals of Biology 2015-01-01T00:00:00Z While male monotremes and eutherians possess mammary glands, male marsupials do not. Concepts of Biology 2013-04-25T00:00:00Z The animals are one of only two types of monotremes - mammals that lay eggs - in the world. Platypus on train sparks Australian police alert 2023-04-05T04:00:00Z Resembling a pug-size hedgehog with the schnoz of an anteater, they are one of only five living species of monotreme, that rare mammal that lays eggs. Echidnas blow snot bubbles to cool down 2023-01-17T05:00:00Z The southern tribosphenic mammals, he says, either died out or became monotremes, a family of mammals that includes the platypus and echidna. Fossils Where They Don’t Belong? Maybe We Just Didn’t Look Hard Enough. 2023-07-16T04:00:00Z By the beginning of the Cenozoic, three major mammal groups had evolved—monotremes, marsupials, and placentals. Miller & Levine Biology 2018-01-01T00:00:00Z Like reptiles, monotremes have one posterior opening for urinary, fecal, and reproductive products, rather than three separate openings like placental mammals do. Concepts of Biology 2013-04-25T00:00:00Z Before now, the only known mammals whose auditory neurons weren’t encased in bone were monotremes, egg-laying animals including platypuses, which split from other mammals 180 million years ago. How a disappearing ear bone turned bats into masters of echolocation 2022-01-26T05:00:00Z But because the monotremes diverged from other mammals so early — about 187 million years ago — they are also “very important for understanding mammalian evolution,” he said. A Question Hidden in the Platypus Genome: Are We the Weird Ones? 2021-01-09T05:00:00Z Echidnas and platypuses are the only two species belonging to the monotreme order of egg-laying mammals. Lucky baby anteater escapes birds, falls from tree into care of Australian zoo 2020-10-21T04:00:00Z "To the west are the tigers, elephants, rhinoceroses and orangutans of Eurasia and to the east, the marsupials and monotremes that are synonymous with Australia." Christmas Island discovery redraws map of life, scientists say 2020-03-23T04:00:00Z These mammals belong to a group called monotremes, whose middle ear evolved independently of that of other mammals. All ears about ancient mammals 2019-11-26T05:00:00Z But one branch of mammals doesn’t suckle: the egg-laying monotremes, which include today’s platypus and echidna, or spiny anteater. Got milk? Even the first mammals knew how to suckle 2018-07-17T04:00:00Z Dr. Zhang and his colleagues plan to continue investigating the many monotreme mysteries that remain. A Question Hidden in the Platypus Genome: Are We the Weird Ones? 2021-01-09T05:00:00Z Platypus are monotremes - a tiny group of mammals able to both lay eggs and produce milk. Platypus milk 'could help save lives' 2018-03-15T04:00:00Z There are three kinds of mammals: egg-laying monotremes such as the platypus, marsupials like kangaroos and opossums, and the majority—placental, or eutherian, mammals—including humans and about 4400 other mammal species. Digital reconstruction of ancient chromosomes reveals surprises about mammalian evolution 2017-06-19T04:00:00Z Monotremes do not use a palinal chewing motion, and the teeth of fossil monotremes do not suggest that such a motion occurred in early members of that lineage10. All ears about ancient mammals 2019-11-26T05:00:00Z The finding “puts a new light on monotremes” and suggests suckling was part of the original mammalian package, says paleontologist and functional anatomist Alfred “Fuzz” Crompton of Harvard University, who led the new studies. Got milk? Even the first mammals knew how to suckle 2018-07-17T04:00:00Z Around 80 million years later, the monotremes—or egg-laying mammals—split off from the mammalian lineage, says Rebecca Young, a biologist at the University of Texas at Austin. How the Venomous, Egg-Laying Platypus Evolved 2016-07-30T04:00:00Z It produced Australia’s first fossil record of a mammal, a monotreme. An Australian Town’s Rare Mix: Dinosaur Bones and Opalized Pine Cones 2016-07-05T04:00:00Z And with those genomes, as well as the genomes of marsupials and monotremes, he and his collaborators plan to tackle the ancestral genome of the first mammal next, which lived about 185 million years ago. Digital reconstruction of ancient chromosomes reveals surprises about mammalian evolution 2017-06-19T04:00:00Z Australia's unique and obscure marsupials and monotremes, such as the spiky echidna and the duck-billed platypus, which are the only egg-laying mammals in the world, attracted 77 percent of research over the period. Australia's ugly mammals fail to catch the eye of scientists, study shows 2016-03-07T05:00:00Z He told the ABC he’d mistaken it for another monotreme at first. Tasmanian wildlife take to water, with echidna and wombat found swimming far from shore 2015-12-02T05:00:00Z Egg-laying mammals are called monotremes, and though once more diverse, today that group contains only the platypus and two species of echidna. Which Animals Have Barely Evolved? 2015-11-14T05:00:00Z There are two other kinds, however: the egg-laying monotremes, which include the duck-billed platypus; and the marsupials, which count kangaroos, opossums and wombats among their ranks. Found: Our Most Distant Ancestor -- Humanity's Great-Grand-Rat 2013-02-08T16:35:27Z It is a one of just three egg-laying mammals, or monotremes - a group that includes the duck-billed platypus. Are these animals too 'ugly' to be saved? 2012-11-20T01:27:34Z One of several species of edentates and monotremes that feed upon ants. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z The only other animal to show this pattern is the platypus, a member of an ancient group of egg-laying mammals known as monotremes. Video: Ostriches Are Stealth Sleepers 2011-08-26T19:38:09Z Living mammals are split into three subgroups: the egg-laying monotremes; the pouched marsupials; and, the most diverse of all, placental mammals, which includes everything from humans to bats to whales. 'Jurassic Mother' Found in China 2011-08-24T18:02:00Z Until this discovery, it was known only in fish, amphibians, and two egg-laying mammals, or monotremes, the platypus and echidna. Guiana Dolphins Can Use Electric Signals to Locate Prey 2011-07-27T00:03:00Z In the Mammalia the eye is largely enclosed in the orbit, and bony plates in the sclerotic are only found in the monotremes. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z That bone is known in a separate state in reptiles and, I think, in monotreme mammals. Dragons of the Air An Account of Extinct Flying Reptiles 2011-02-20T03:00:13.067Z About those monotremes—sensible men don't quarrel over things like that. Astounding Stories of Super-Science February 1930 Yet somehow into Australia with its queer monotremes and marsupials entered triumphant man—man and the dog with him. Anthropology The oviparous monotreme and the marsupial almost certainly represent lower mammalian ancestral stages. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 But in the monotremes the formation of the cenogenetic entoderm does not precede the invagination; hence in this case the construction of the germinal layers is less modified than in the other amniota. The Evolution of Man — Volume 1 The higher mammals had appeared, and henceforth the lower mammals—the monotremes and the marsupials—are reduced to a subordinate place. The Elements of Geology "Invasion by—new species of—monotremes," he croaked. Astounding Stories of Super-Science February 1930 It is beyond my knowledge to weigh ranks of birds and monotremes; in the respiratory and circulatory system and muscular energy I believe birds are ahead of all mammals. More Letters of Charles Darwin — Volume 1 The marsupials, except the opossum, are confined to Australia, and the oviparous mammals, or monotremes, to New Zealand. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 The marsupials, a second sub-class, come next to the oviparous monotremes, the oldest of the mammals. The Evolution of Man — Volume 1 Australia as the only country inhabited by marsupials, monotremes and meliphagous birds. Darwin and Modern Science One section of the marsupials still show points of agreement with the monotremes, while another section of them, according to the splendid investigations of Selenka, form a connecting-link between these and the placentals. The Evolution of Man — Volume 1 The two lower sub-classes, monotremes and marsupials, retain the simpler structure of their ancestors, the reptiles. The Evolution of Man — Volume 1 Moreover, it requires a large amount of material to form a mammalian egg, such as that of the monotreme. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 In the monotremes more primitive conditions have been retained better than in the reptiles and birds. The Evolution of Man — Volume 1 The oldest, oviparous mammals, the monotremes, behave in the same way as the reptiles and birds. The Evolution of Man — Volume 1 These are clearly connected with the fact that the ancestors of the viviparous mammals were oviparous amniotes like the present monotremes, and only gradually became viviparous. The Evolution of Man — Volume 1 In this way the original food-yelk of the monotremes gradually atrophied, and at last disappeared so completely that the partial ovum-segmentation of their descendants, the rest of the mammals, once more became total. The Evolution of Man — Volume 1 |
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