Tag: "skeletons" at biology news
Sea change: Skeletons of ancient corals different from today's
...ficult for the marine animals -- which build their skeletons
from a mineral called aragonite calcium carbonate ...riod almost certainly built at least part of their skeletons
from calcite. This is groundbreaking, because it was previously believed that organisms do not gener...
Army-funded effort examines androgen's role in bone loss
...ortant to the development of the sexually distinct skeletons
of men and women. "There are receptors everywhere, but these mice demonstrate proof of concept that the androgen receptor in bone is responsible for sexually dimorphic skeletons. In other words, that male bones are wider than female," ...
Global warming good news for coral reefs: research
...hen red algae cement together a framework of coral skeletons
and sediments. Seawater surface temperatures and the quantity of carbonate in seawater dictate their growth rate. The Australian scientists have observed the calcification-temperature relationship at significant reef-building colonies around the ...
Drought reduces nitrogen-fixing in legumes
...n use it. This ammonia is incorporated into carbon skeletons
in order to form aminoacids and proteins. On the other hand, the micro-organism obtains nutrients necessary for its growth from the plant. Under drought conditions, a reduction in nodule sacarose synthesis activity was observed. This drop occurred si...
Gene therapy converts dead bone graft to new, living tissue
...transformation can occur because mammals use their skeletons
for both support and as a kind of "calcium bank." If calcium, which is necessary for such important functions as maintaining the brain and heart, runs low, cells called osteoclasts dig out the calcium from our bones. This is why doctors encourage pos...
The secret lives of whales
...Known as whale falls, their decomposing bodies and skeletons
provide an energy source for specialized communities of animals that can last 50 to 100 years. Smith and his colleagues first happened upon a whale skeleton in 1987 while doing a deep-sea survey using the submersible Alvin. They were amazed to find h...
UF researcher: Ideas about fossil horses undergo evolution in thinking
...ermine horse diets. Animals incorporate into their skeletons
and teeth the carbon content of the plants they eat, he said, and grasses photosynthesize carbon differently than do leaves, shrubs or trees. John Flynn, Frick Curator of fossil mammals at the American Museum of Natural History, said MacFadden's fin...
Whale bones and farm soil: Sequencing biodiversity
...ators to analyze two very different samples: whale skeletons
from the bottom of the ocean floor and soil from a farm in the USA. Sunken whale skeletons
are a lipid-rich nutrient source that can foster the growth of a flourishing ecosystem that contains...
Study reveals new technique for fingerprinting environmental samples
...nesota farm and samples of several different whale skeletons
collected from the Pacific and Artic ocean depths separated by thousands of miles. The DNA was then sequenced and analyzed by the JGI. While different environments present different metabolic pictures, this research, Rubin said, facilitates a holis...
The Ape in the Tree: An intellectual and natural history of proconsul
...preserved the contents of an ancient hollow tree: skeletons
of carnivore's prey that had been carried to its l...y to Nairobi with an unprecedented ten new partial skeletons
of Proconsul. As a bonus, they collected hundreds of specimens of contemporary species -- rhinos, p...
Killer dinosaurs turned vegetarian
...alcarius, only "bits and pieces" of other species' skeletons
had been found, and "their anatomy was so different from that of any other dinosaur that we didn't know what to make of them," Zanno says. The most advanced therizinosaurs which lived 94 million to 65 million years ago had larger bodies, long neck...
DOE JGI sequences DNA from extinct cave bear
...,000 years old, the tropical environment where the skeletons
were found may have accelerated the DNA degradation process. The Flores Man is believed to have derived from a more ancient hominid lineage, Homo erectus, which diverged from modern humans some two million years ago, as compared to Neandertal, which...
Oceans turning to acid from rise in CO2
...hotosynthesis. Organisms also use it to make their skeletons
and shells, which eventually form sediments. With the explosion of fossil-fuel burning over the past 200 years, it has been estimated that more than a third of the human-originated greenhouse gas has been absorbed by the oceans. While marine organism...
Virginia Tech, Nanjing Institute researchers discover half-billion year-old fossils
...relude to the Cambrian Explosion when animals with skeletons
and familiar morphologies began to bloom about 540-520 million years ago," Xiao said, "However, classic Ediacara fossils are mostly preserved in sandstone, and the coarse sand grains limit how much we can learn about the fine-scale morphologies of th...
Study: Predatory dinosaurs had bird-like pulmonary system
...aduate student in 1996. They compared the dinosaur skeletons
with those of modern birds to draw comparisons of ...monary system was based on a study of two dinosaur skeletons
encased in rock. O'Connor and Claessens have expanded on that research by studying a broader collect...
Earliest embryos ever discovered provide clues to dinosaur evolution, parenting: Study
...nted by embryos as well as by numerous articulated skeletons
of juveniles and adults. The results have major implications for our understanding of how these animals grew and evolved," he says. The Massospondylus hatchling was born four-legged (quadruped), with a relatively short tail, horizontally held neck,...
Study shows big game hunters, not climate change, killed off sloths
... samples from the large collection of ground sloth skeletons
at the Florida Museum of Natural History on the UF campus, to Paul Martin, a professor emeritus of geosciences at the University of Arizona, for radiocarbon dating. Steadman said he was not surprised to find that humans were more significant than cha...
A new twist on power walking
...) biomechanics expert who studies how muscle moves skeletons
in fish and frogs has invented a backpack that gives new meaning to the term power walking. In a paper published in the September 9 issue of Science, Lawrence C. Rome, a University of Pennsylvania biology professor who spends his summers conducting ...
How to avoid severe climate change discussed at CO2 conference
...e oceans. Some of the ocean carbon is used to make skeletons
and shells. It is possible that about half of the predicted emissions could be sequestered this way. According to Caldeira, however, the net result of continuing current trends could yield an atmosphere with about five times more CO 2 than would ha...
Earliest European farmers left little genetic mark on modern Europe, Science study finds
...st detailed analysis of ancient DNA extracted from skeletons
of early European farmers. The passionate debate ...acted and analyzed DNA from the mitochondria of 24 skeletons
of early farmers from 16 locations in Germany, Austria and Hungary. Six of these 24 skeletons
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