Tag: "vertebrate" at biology news
Stanford researchers develop system for field testing mechanisms of evolution
...led genetic studies of the mechanisms that control vertebrate
evolution. Other authors on the paper include first author Catherine Peichel, PhD, research associate with the Howard Hughes Medical Institute and Stanford Department of Developmental Biology, as well as Kirsten Nereng, PhD, Kenneth Ohgi, PhD...
Fish may show how nature diversifies
...at until now could not be tested experimentally in vertebrate
animals. In the December 20, 2001, issue of the journal Nature , HHMI investigator David M. Kingsley, HHMI associate Catherine L. Peichel and their colleagues at Stanford, the University of Wisconsin, Eau Claire, and the University of British Col...
December Media Mighlights: GEOLOGY and GSA TODAY
...ger for a cooling event during the early Holocene, vertebrate
extinctions during the Permian-Triassic as found i...ate the topography of Earths surface. Pattern of vertebrate
extinctions across an event bed at the Permian-Triassic boundary in the Karoo Basin of South Africa....
Scientists reveal role for nitric oxide during brain development
...ation of the essential role of nitric oxide during vertebrate
brain development. Grigori Enikolopov, the princip...zed production of nitric oxide is required for the vertebrate
brain to develop normally (see figure). In the "midbrain" of tadpoles, cells in a particular zone fi...
Blame North America megafauna extinction on climate change, not human ancestors
...tion of the world's islands resulted in widespread vertebrate
extinction, Grayson said this did not occur simply...urely documented the prehistoric extinction of any vertebrate
as a result human predation, though it may certainly have happened. In virtually all cases, when pe...
Caterpillars make noise to fend off intruders, researchers discover
...ed to my attention, it appeared to be similar to a vertebrate
model of territoriality. We didnt anticipate that such a behavior occurred in organisms such as these. The research appeared Sept. 25 in the Proceedings of the National Academy of Science. (Three audio-video clips are at www.pnas.org/cgi/content/f...
APS August/September journal hot picks
...uries and exercise, cloning a 200-million year old vertebrate
for research on newborn liver disease, asthma and...y presents evidence that the BSEP evolved early in vertebrate
evolution and that its functional properties have remained essentially unchanged despite 200 million...
California gnatcatcher: Umbrella species failure?
...astal sage scrub. "The strategy of using a single vertebrate
species as an umbrella for the whole fauna of California coastal sage scrub is flawed," says Daniel Rubinoff of the University of California at Berkeley in the October issue of Conservation Biology. "Insects are almost never considered in conservatio...
NU scientist finds answers in Antarctic icefish
...icebergs for the 15 species of icefishes, the only vertebrate
taxonomic group that does not produce red blood cells or hemoglobin. While most of the world took warmth and natural light for granted last month, Detrich and his colleagues were finding out firsthand how the icefishes survive and thrive without a n...
From flies to humans-ancient gene may be involved in male infertility
...located on human chromosome 3. DAZL arose in early vertebrate
some 120-200 million years ago and has been shown in the frog to be required for development of the earliest step in the development of both female and male germ cells (reproductive cells) - the creation of germ stem cells. The gene's role in humans ...
Hutchinson Center researchers first to induce state of suspended animation in model vertebrate organism
...mation in the zebrafish, a relatively new model of vertebrate
developmental biology. Their work, the first demonstration of this phenomenon in a vertebrate
model organism highly suitable to laboratory analysis, will be described tomorrow in the June 12 iss...
Ancient reptile is efficient chewer
...illion years ago is the first known efficient land vertebrate
chewer -- able to use a shearing chewing action to... predated the dinosaurs -- which branched from the vertebrate
tree millions of years later -- some of whose plant-eating species evolved similar chewing mechanism...
Earliest chewing herbivore ever found spurred vertebrate life on land, scientists find
...may have signaled one of the first great bursts of vertebrate
life on land, say paleontologists from the University of Toronto and Duke University. "The real boost in the success of vertebrates on land started with the ability to process plant material efficiently," says University of Toronto at Mississauga p...
Penn paleontologists locate a new genus of colossal dinosaur along an ancient coastline
... in northern Africa," said Thomas R. Holtz, Jr., a vertebrate
paleontologist at the University of Maryland not involved with the Penn team. "Of obvious significance is the discovery of a truly gigantic sauropod dinosaur, closely related to but apparently distinct from the largest currently described dinosaur, ...
Discovery of 'tidal giant'--a new Egyptian dinosaur--reported in Science
...ns about a relatively mysterious time and place in vertebrate
history. Scientists have found groups of vertebrates that were common to South America and Madagascar during the Late Cretaceous, but these same groups appear to be missing from Africa. Some paleontologists think this pattern exists because the South...
International scientists probe unsolved puzzles of the Earth and beyond at "Earth System Processes"
...at half of all marine invertebrate and terrestrial vertebrate
families became extinct, together with a high proportion of terrestrial plants. Hallam uses results of investigations over the past 20 years in biostratigraphy, facies analysis, and geochemistry, to evaluate possible causes. Cosmologist Charles H. L...
More extensive analysis casts doubt on portion of the public project's human genome paper
...ansferred directly from bacteria into an ancestral vertebrate
species. TIGR scientists reanalyzed the 31,780 genes that were the focus of the IHGSC report, and also analyzed the 26,544 genes reported in the human genome paper published in Science (Feb. 16, 2001). They compared these human genes to a larger sam...
Understanding lens development
...ity have discovered the key molecular event behind vertebrate
lens induction. Despite being a topic of research for one hundred years, the mechanism of lens development has remained relatively elusive. However, published in the May 15th issue of Genes & Development, Dr. Kondoh and colleagues detail their disco...
$100,000 prize to pioneers in neural research
...e genes and mechanisms are nearly identical in all vertebrate
animals. The March of Dimes Prize in Developmental Biology is awarded annually to investigators whose research has profoundly advanced the science that underlies our understanding of birth defects. The March of Dimes created the Prize as a tribut...
A worm is more like a human than previously thought
...ent layers -- ectoderm, mesoderm, and endoderm. As vertebrate
embryos mature or develop, the mesoderm produces h...age to control that selection in both the worm and vertebrate
animals, said Rothman. This implies that the common ancestor from many hundreds of millions of yea...
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