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Tag: "evolution" at biology news

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

...e) tyrannosauroid yet will shed light on the early evolution and geographical distribution of its ancestors –?s...nternationally known expert on the development and evolution of the vertebrate musculoskeletal system, Erickson helped confirm the tyrannosauroid lineage of the ...

First demonstration of 'teaching' in non-human animals

... constraint of brain size, that has influenced the evolution of teaching. The research, by Professor Nigel Franks and Tom Richardson from Bristol University, is reported today in Nature [12 January 2006]. According to the accepted definition of teaching in animal behaviour, an individual is a teacher if it...

Lizard 'third eye' sheds light on evolution of color vision

...y humans, it does reveal one potential step in the evolution of color vision, the Hopkins researchers say. Human light-reception cells responsible for color vision are called cone cells or photoreceptors, and they contain only one kind of pigment per cell - red, green, or blue. A color image results when ligh...

New analysis shows three human migrations out of Africa

...tical test to refute the theory, dominant in human evolution science for more than two decades. "Not only does...rsisted instead of going extinct, which some human evolution researchers thought had occurred.The new data confirm an expansion out of Africa to 700,000 years a...

Sociality of sweat bees evolved simultaneously during climate change

In the first study to link social evolution to climate change, Cornell University entomologist...y during a period of global warming. This social evolution occurred much more recently than scientists ever thought -- only 20 million to 22 million years ago,...

Evolutionary shifts in olfactory sensitivities in fruit flies

...ngle fruit type, researchers have demonstrated how evolution can act on several different levels of a sensory s...her types of sensilla. The work suggests that the evolution of a specialized olfactory system can occur during a limited evolutionary time span, and at several ...

New test to detect rare proteins in blood

...d that the FACTT technology represents the further evolution of an earlier approach that was developed in collaboration with Professor of Pharmacology James Eberwine, PhD, also from Penn. The earlier technique employed radioisotopes. Development of a test for the cancer marker Her2/neu The researchers comp...

Outsmarting the smartie bug

...lso going to give us fascinating insights into the evolution of the amazing diversity of capsular genes that can be produced by this pathogen" Researchers are at pains to point out that current vaccines are enormously successful and vaccination plays an essential in protecting all of us. The pneumococcal vacc...

Relationship of brain and skull more than just packaging

...brain change jointly through evolution. Vertebrate evolution shows a trend toward fewer skull and jaw bones and...ing craniosynostosis could shed light on the joint evolution of the brain and skull. The two types of craniosynostosis the researchers studied were early closur...

Research updates 65-year-old genetic discovery

...ons concerning the origins, population history and evolution of humans and the great apes, sent DNA samples of each of three subspecies of chimpanzees to the University of Utah. "No chimpanzees were harmed to obtain the samples," Stone notes. The DNA is provided by veterinarians and comes from either blood sa...

Males with elevated levels of testosterone lead shorter lives but have more success siring offspring

...enerally negative and may ultimately constrain the evolution of higher testosterone levels in males," conclude the authors. ...

Scientists force viruses to evolve as better delivery vehicles for gene therapy

...n Kaspar, decided to speed up the process of viral evolution and direct the change in a way that would allow th... current issue of Nature Biotechnology. "Directed evolution has mainly been done to change the activity of an enzyme - to make it more effective toward a new su...

Evolution follows few of the possible paths to antibiotic resistance

Darwinian evolution follows very few of the available mutational pathw...gnized for at least 35 years, its implications for evolution by natural selection have remained unexplored. Specifically, it is of great interest to determine wh...

UF scientists trace origin of shark's electric sense

...said. "If you think of this in the big picture of evolution of sensory systems, such as olfaction, hearing, vision and touch, this shows sharks took a pre-existing genetic program and used it to build yet another type of sensory system," Cohn said. UF and University of Louisiana researchers analyzed electror...

Most human-chimp differences due to gene regulation ?not genes

...ated on these specific groups of genes. This rapid evolution in transcription factors occurred only in humans."...., associate professor of genetics and ecology and evolution at Yale and senior author of the study. "In addition to lending support to the idea that changes in ...

Where 'jumping genes' fear to tread

...ave accumulated in humans throughout the course of evolution and now comprise an estimated 45% of the total DNA content in the human genome. These mobile genetic elements are scattered throughout the human genome ?separated, on average, by only 500 base pairs. But Dr. John Mattick's laboratory at the Univers...

ASU researchers find link between social behavior, maternal traits in bees

One of the puzzling questions in the evolution of bees is how some species developed social behav...rsity of California, Davis in 2003 researching the evolution of social behavior and aging in bees. While at Davis, Amdam met professor Robert Page, who was bree...

Don't hold your breath: Carp can manage without oxygen for months

...dustrialized world. We have here a situation where evolution has solved the problem of anoxic survival millions of years ago, something that medical science has struggled with for decades with limited success", says Professor Göran Nilsson who will be presenting his latest results at the Annual Meeting for the...

Finding a virus is not all bad news

...r population size, the population changes, rate of evolution and rate of movement in the past hundred years," s..., the changes in the population over time, rate of evolution and rate of movement. "This new technique of analysing the genetic data from a virus in an animal r...

Anemone genes reveal versatile building blocks for body plans

...aii and Stony Brook University. To understand the evolution of body-plan patterning, the researchers isolated a particular set of genes from a tiny translucent cnidarian, the starlet sea anemone, Nematostella vectensis. The genes were the anemone's version of genes known to be responsible for organizing the d...

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