Are birds and dinosaurs argon evolutionarily related?
Researchers from Harvard Medical School and Beth Israel Deaconess Medical Center captured and sequenced fiddling pieces of collagen protein from a 68 million-year-old Tyrannosaurus rex and a 160,000- to 600,000-year-old mastodon. The T. rex sequences atomic number 18 the oldest forever to be reported. Courtesy Zina Deretsky, National Science Foundation)
Most tidy sum believe that birds evolved from dinosaurs, but thats all based on the architecture of the studys, said John Asara, director of the mass spectrum analysis core facility at Beth Israel Deaconess Medical School and HMS instructor in pathology, who sequenced the protein fragments over the course of a year and a half using highly sensitive mass spectrographic analysis methods. This allows you to exit the chance to say, Wait, they really are related because their sequences are related. We didnt get enough sequences to definitively say that, but what sequences we got obtain that idea.
In another study appearing in the equal issue of Science, Mary Schweitzer, of North Carolina State University, and colleagues found that extracts of T. rex bone reacted with antibodies to chicken collagen, further suggesting the presence of birdlike protein in the dinosaur bones.
The mere cosmos of such exceedingly ancient protein defies a longstanding assumption. When an living organism dies, protein immediately begins to degrade and, in the case of fossils, is slowly replaced by mineral. This substitution process was thought to be complete by one million years.
For centuries it was believed that the process of fossilization destroyed every original material, consequently no one looked...If you want to get a full essay, order it on our website: Ordercustompaper.com
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