Sentences with phrase «land vertebrates»
"Land vertebrates" refers to animals that have a backbone (vertebrates) and live primarily on land. These animals include creatures like birds, mammals, reptiles, and amphibians that can survive and thrive on land rather than in water. Full definition
Over 90 percent of all marine species and 70 percent of land vertebrates perished as a result, according to the NASA - funded research team, led by Dr. Luann Becker of the University of Washington (UW), Seattle.
astrobio.net
It is the only land vertebrate where the male becomes pregnant, carrying and brooding tadpoles inside its vocal sac until they metamorphose and are spat out as baby frogs.
Those prints were made by the earliest tetrapod (four - legged) land vertebrate ever found.
The team also compared the 7442 genes found as single copies in both the cobra and the python with the same genes in all other land vertebrates sequenced so far.
The fossil record shows that 95 % of all life was wiped out; the only large land vertebrate to survive was a pig - like dinosaur called «Lystrosaurus.»
No, there are only around 34,000 land vertebrate species today, the rest are marine animals, insects and other creatures (bacteria, etc).
At the same time the muscles that moved the jaws became bigger as land vertebrates evolved a more powerful bite.
Dr Weisbecker said her lab aimed to tell the evolutionary story of today's diverse land vertebrates through developmental biology.
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.
All other land vertebrates never have more than four limbs, arranged in two pairs, fore and hind, and the wings of flying vertebrates are invariably modifications of the forelimbs.
«Rainforest collapse 307 million years ago impacted the evolution of early land vertebrates.»
Dunne continued: «We now know that the rainiforest collapse was crucial in paving the way for amniotes, the group which ultimately gave rise to modern mammals, reptiles and birds, to become the dominant group of land vertebrates during the Permian period and beyond.»
Though they are reptiles, almost all snakes are completely missing the limbs typical of most land vertebrates.
MASS & EXTINCTION ► Humans and livestock are 97 % of land vertebrate biomass ► Humans and livestock eat 40 % of land chlorophyll biomass ► 50 % of vertebrate species died off in the last 50 years.
Ecuador ranks as one of the world's most biodiverse countries, and has the greatest biodiversity of land vertebrates per area.
The world's 35 biodiversity hotspots — which harbor 75 percent of the planet's endangered land vertebrates — are in more trouble than expected, according to a sobering new analysis of remaining primary vegetation.
The Bible said not all species of animals but all kinds of animals, and not all animals, only land vertebrates.
Yet there is no trace of communication by learned symbolic languages among reptiles, of hair or feathers among amphibians, of the auditory apparatus of land vertebrates, or of legs or wings, among the fish.
All land vertebrates carry a version of the FOXP2 gene, so some of the Oxford researchers then teamed up with colleagues from the Max Planck Institute for Evolutionary Anthropology in Germany to analyze what is unique about the variant in humans and to track how the gene had evolved in our ancestors.
The new findings are surprising, the researchers said, and may also be of interest for biomedical studies aiming to unravel the mechanisms responsible for salamander regeneration, as they indicate that not only salamander - specific factors may play a role for the high regenerative capacities, but also mechanisms that all land vertebrates carry within them due to their common evolutionary heritage.
No one had shown fluorescence in amphibians, or in any land vertebrate except parrots, until he and colleagues recently tested South American polka dot tree frogs.
«They're present in all land vertebrates, and they hold the belly in.»
Though some freshwater fish are known to occasionally dine on land vertebrates — an African tiger fish has been filmed plucking a swallow out of the air, for example — it is rare for so many to be eaten.
In all land vertebrates (including humans), spines form from only one group of cells called somites.
Criswell and Gillis decided to study spinal development in skates, which are cartilaginous fishes — a distant relative of both land vertebrates and ray - finned fishes.
A specialized egg, like that of modern birds, made it possible for developing young to survive on land, she notes, and thus allowed our land vertebrate ancestors to leave the seas about 360 million years ago.
«And then we get complete sets of lineages we are quite familiar with: coelacanths, also lungfish, and of course our direct ancestors the tetrapods (every land vertebrate ever, plus birds, bats, dolphins and whales).»
But why did this lead to the extinction of up to three quarters of land vertebrates to disappear?
The Thungyai - Huai Kha Khaeng Wildlife Sanctuaries, which run along the Myanmar border, contain examples of nearly all forest types found in continental Southeast Asia and 77 percent of the large mammals, 50 percent of the large birds, and 33 percent of the land vertebrates in the region, according to UNESCO.