Sentences with phrase «by vertebrate animals»
This suggests that brain sleep dates back at least to the evolution of the amniotes, that is, to the beginning of the colonization of terrestrial landmass by vertebrate animals.
https://www.sciencedaily.com/ Not exact matches
There is no such «direct» evolution: animals, bacteria, and algae have a common ancestor from which they have diverged, as can be shown by aligning and comparing amino acid sequences of proteins and nucleotide sequences of homologous ribosomal RNA molecules that are found in both bacteria and 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 extinction that ended the Devonian Era 359 million years ago created opportunities quickly exploited by a formerly rare and unremarkable group of fish that went on to become — in terms of the sheer number of species — the most successful vertebrates (backboned animals) on the planet today: the ray - finned fish.
Growth hormone is a polypeptide hormone synthesised and secreted by the anterior pituitary gland which stimulates growth and cell reproduction in humans and other vertebrate animals.
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.
The mammals are the class of vertebrate animals characterized by the production of milk in females for the nourishment of young, from mammary glands present on most species and specialized skin glands in monotremes that seep or ooze milk; the presence of hair or fur; specialized teeth; three minute bones within the ear; the presence of a neocortex region in the brain; and endothermic or «warm - blooded» bodies.
Funding was provided by the Cornell Center for Vertebrate Genomics, Zweig Memorial Fund and Morris Animal Foundation.
Generations of biology students have been convinced — in part because of drawings done 123 years ago by the German biologist Ernst Haeckel — that vertebrate embryos of different animals pass through an identical stage of development.
Read previous Zoologger columns: Horror fly returns from the dead, Even parasitic worms have a divided society, Shrimp plays chicken with its sex change, Death by world's longest animal, Live birth, evolving before our eyes, Sympathy for the piranha, The world's most fecund vertebrate, Whale - eater's helpful sulphur - powered guests, Horror lizard squirts tears of blood, Secret to long life found... in a baby dragon
Read previous Zoologger columns: How weakness makes the crayfish stronger, The heaviest animal in the air, Ancient air - breathing, triple - jawed fish, Horror fly returns from the dead, Even parasitic worms have a divided society, Shrimp plays chicken with its sex change, Death by world's longest animal, Live birth, evolving before our eyes, Sympathy for the piranha, The world's most fecund vertebrate.
Read previous Zoologger columns: Ancient air - breathing, triple - jawed fish, Horror fly returns from the dead, Even parasitic worms have a divided society, Shrimp plays chicken with its sex change, Death by world's longest animal, Live birth, evolving before our eyes, Sympathy for the piranha, The world's most fecund vertebrate, Whale - eater's helpful sulphur - powered guests, Horror lizard squirts tears of blood.
The study, led by Dr Gareth Fraser from the University of Sheffield's Department of Animal and Plant Sciences, has revealed that the pufferfish has a remarkably similar tooth - making programme to other vertebrates, including humans.
«As soon as you're missing a single species in your data matrix, you may be missing a key function that is only represented by that species,» says Jetz, who has studied functional traits in plants and vertebrate animals, particularly birds.
«Branchial rays will figure prominently in the story of the evolutionary origin of vertebrate animal appendages, either by shedding light on the evolutionary antecedent of paired fins / limbs, or by teaching us about the genetic mechanisms that animals can use to invent new appendages,» Gillis says.
By contrast with domesticated animals, the percentage of truly wild vertebrates left today as a result of these long - term processes is described as «vanishingly small».
These and other details about the two animals that lived about 142 million years ago were presented by biologist Pernille Venø Troelsen from University of Southern Denmark on July 10 2015 at XIII Annual Meeting of the European Association of Vertebrate Paleontologists in Opole, Poland.
The researchers said the discovery means modern vertebrates originated in a world that was already populated by small and large - bodied physical extremes, in terms of how animals physically adapted to their environment.
Human & Vertebrate Animal Tissue (6B) This form is filled out by the student researcher and explains the source of the tissue.
Soon, plant - eating animal life followed (including Arthropods such as the scorpion - like Eurypterids that moved from marine waters into brackish then fresh water — some species becoming amphibious and emerging onto land for part of their life cycle after becoming capable of breathing in both water and air — which eventually evolved into insects, and finally, by 379 million years ago, animals with backbones known as «vertebrates» which evolved from Fishes that moved onto land to evolve into Amphibians and eventually into Reptiles, Dinosaurs, Birds, and Mammals — Niedzwiedzki et al, 2010).
The same sequence of DNA specifying that corkscrew shape has been exactly preserved by evolution in many vertebrate animals suggesting it has an important biological function.
You can ask them what animals are vertebrates and invertebrates, and children should point them by looking at them.
Under this law, the sale or transfer of any «live vertebrate creature except man» to someone on the abuse registry or anyone who «purchases any animal on behalf of any person having resided in Cook County and listed as an animal abuse offender» is a violation punishable by escalating fines for subsequent offenses.