Sentences with phrase «first vertebrate»

Polar bears were actually the first vertebrate species to be listed under the U.S. Endangered Species Act as threatened with extinction primarily due to global warming.

KNOXVILLE — Around 390 million years ago, the first vertebrate animals moved from water onto land, necessitating changes in their musculoskeletal systems to permit a terrestrial life.

Unknown artist, Remote Sensing Tutorial, GSFC, NASA Marine inverterbrate life in the late (or «Upper») Ordovician, after the first vertebrate fishes had evolved.

Around 390 million years ago, the first vertebrate animals moved from water onto land, necessitating changes in their musculoskeletal systems to permit a terrestrial life.

«It was probably the first vertebrate that was able to fragment its prey before swallowing,» says zoologist Mark Westneat of the Field Museum in Chicago.

Marine reptiles were among the first vertebrate fossils known to science and were key to the development of the theory of evolution.

In 1994, the first vertebrate transposons were discovered in zebra fish, but they were inactive and appeared to have been silenced millions of years ago.

A new analysis of the prehistoric origin of malaria suggests that it evolved in insects at least 100 million years ago, and the first vertebrate hosts of this disease were probably reptiles, which at that time would have included the dinosaurs.

Sex hormones, including testosterone, evolved 500 million years ago — before the first vertebrate animals — from the «mother» of all steroid hormones, estrogen.

The first vertebrates to forsake the seas probably didn't walk or even crawl, however.

The African lungfish (Protopterus annectens) has lobe - shaped fins similar to those seen in the ancestors of the first vertebrates to walk on land.

Researchers at the University of Birmingham have discovered that the mass extinction seen in plant species caused by the onset of a drier climate 307 million years ago led to extinctions of some groups of tetrapods, the first vertebrates to live on land, but allowed others to expand across the globe.

The early tetrapods (from the Ancient Greek word meaning «four - footed») were the first vertebrates to tread terra firma, developing lungs to capture atmospheric oxygen and turning fins into legs, but with a life cycle that was still closely tied to aquatic environments.

Tunas are the first vertebrates known to use lymph in locomotion.

Scientists have long supposed that the first vertebrates to emerge from the sea 360 million years ago slithered onto shore like fish with legs.

Qingmendous, scientists report in the journal Science Advances on Friday, was part of a group of «lobe finned fishes» that included the first vertebrates to crawl onto land.

The Pterosaurs were the first vertebrates to evolve flight.

Not exact matches

Originally when life was first evolving, there were no vertebrates, evolution doesn't have «one thing turning into another» like pokemon, it has life branching off like a giant complex web.

This is typical Rothschild: considering the bends not as a human ailment, first documented by a miner in 1841, but as a vertebrate's disease, one that can be tracked backward through more than 200 million years of mammalian evolution.

This evidence was crucial because only vertebrates have two different shapes of melanosome, meaning that unlike previous researchers that thought that Tullimonstrum was an invertebrate (animal without a backbone), this is the first unequivocal evidence that Tullimonstrum is a member of the same group of animals as us, the vertebrates.»

By comparing the genomes of 203 vertebrates, they first traced the origin of KZFPs back to a common ancestor of tetrapods (four - legged animals) and coelacanth, a fish that evolved over 400 million years ago.

The phase of gastrulation, in which the germ layers form through invagination of the outermost cell layer, is the first great cell migration phase in the development of vertebrates.

The researchers published their results in the journal Neuron, becoming the first to show the effects of sleep / wake cycles and time of day on the synapses of a living vertebrate.

Such lateralization, corresponding to our right - and left - handedness, suggests specialization in the brain's hemispheres, which is believed to improve its efficiency and which was first considered an exclusively human, then an exclusively vertebrate, attribute.

Through her discussion of when, where, and how vertebrates first came ashore, Clack offers an up - to - date account of our understanding of the fish to tetrapod transition, one of the classic evolutionary stories.

Scientists have taken advantage of the lamprey's simplicity — its neurons number in the thousands, while humans have billions — to produce the first complete blueprint of a vertebrate motor system.

The latest findings reinforce a 2016 Storz - led study published in the journal Science, which was the first to establish that vertebrate species can follow different molecular - level paths to reach the same adaptation.

The first group of prints — a 395 - million - year - old track created by a four - legged land vertebrate — made the cover of Nature last January.

When humans began settling on the island about 2,300 years ago, Madagascar's large vertebrate populations were the first casualties.

The lungfish ear is a good model for the ears of the first terrestrial vertebrates.

The vertebrates could therefore have been deaf for the first 100 million years on land.

Marine researchers are calling for international action to save the barndoor skate, which they fear could become the first salt water vertebrate to be fished to extinction.

High - tech analyses of pterosaur skulls show that the first flying vertebrates packed some sophisticated navigational hardware.

This is the story of one of the winners, a small, shell - crushing predatory fish called Fouldenia, which first appears in the fossil record a mere 11 million years after an extinction that wiped out more than 90 percent of the planet's vertebrate species.

«In addition, we reconstructed the evolutionary history of host associations of the entire family of viruses, demonstrating for the first time that viruses affecting vertebrates developed from arthropod - specific viruses,» says the researcher from the University of Bonn Hospital.

For the first time, researchers have investigated the cheetah's extraordinary sensory abilities by analyzing the speedy animal's inner ear, an organ that is essential for maintaining body balance and adapting head posture during movement in most vertebrates.

Now, in the first report on the effects of erasing a single microRNA in a vertebrate, scientists describe mice with subtle but profound heart abnormalities.

That oddly textured pebble, scientists report at the Society for Vertebrate Paleontology meeting, is actually an endocast — an impression preserved in the rock — that represents the first known evidence of fossilized brain tissue of a dinosaur (likely a close relative of Iguanodon, a large, herbivorous type of dinosaur that lived about 133 million years ago).

In their first paper, published in the Journal of Vertebrate Paleontology in 1997, Schweitzer, Horner, and colleagues reported that spectroscopy and chemical analyses of extracts from a T. rex femur suggested preserved proteins, including a form of collagen abundant in modern animal bones.

This survey is the first to compare a diverse array of warm - blooded vertebrates, 10 mammals and 24 birds altogether.

«We analyzed, for the first time at such a large scale, global patterns of island vertebrate extinctions in relation to different types of invasive mammals and physical island conditions,» McCreless said.

He explains that «we are the first to show these similarities between gene activation in diapause and aging in vertebrates.

«But obviously, the fly wing and the vertebrate arm are so different that somewhere you have to start finding differences, and we have found the first: Engrailed controls Radical fringe in chicks, which it doesn't do in flies.»

It may be one of the first wild fluorescent vertebrates known to science, but it's not making its debut in a pre-eminent research...

At just 6.2 millimeters long, a swamp - dwelling male anglerfish from Southeast Asia, first described in 2005, is currently regarded as the world's smallest vertebrate.

The newly described species (artist's representation shown), which lived between 220 million and 230 million years ago, was one of the largest in a group of amphibians known as metoposaurs and is the first known in this region from well - preserved fossils, the researchers report online today in the Journal of Vertebrate Paleontology.

«Our results with Drosophila exhibit surprising similarities in some respects to what we know about the regulation of resting phases in mammals, allowing for speculation as to whether the Hippo signaling pathway in neural stem cells functions in the same manner in both vertebrates and invertebrates,» stated the paper's first author Rouven Ding.

It's possible a surge also brought vertebrates onto land for the first time.

«This is the first time the complete genetic code — the genome — of any vertebrate species from Panama has been sequenced and analyzed,» said Oris Sanjur, co-author and Associate Director for Science Administration at STRI.

While we only get to see the vertebrate collection — missing the first diverse animal fauna of Ediacara — it would be hard to cover a broader realm in so much detail.