Phylogenetic tree
hideA phylogenetic tree or evolutionary tree is a tree showing the evolutionary relationships among various biological species or other entities that are believed to have a common ancestor. In a phylogenetic tree, each node with descendants represents the most recent common ancestor of the descendants, and the edge lengths in some trees correspond to time estimates. Each node is called a taxonomic unit. Internal nodes are generally called hypothetical taxonomic units (HTUs) as they cannot be directly observed.
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News tagged with evolutionary tree
Evolution may take giant leaps
Dec 11, 2009 |
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(PhysOrg.com) -- A new study of thousands of species of plants and animals suggests new species may arise from rare events instead of through an accumulation of small changes made in response to changes in ...
Fossils shake dinosaur family tree
Other Sciences / Archaeology & Fossils
Dec 10, 2009 |
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(PhysOrg.com) -- Paleontologists have unearthed a previously unknown meat-eating dinosaur in New Mexico, settling a debate about early dinosaur evolution, revealing a period of explosive diversification and ...
Scientists use world's fastest supercomputer to create the largest HIV evolutionary tree
Medicine & Health / HIV & AIDS
Oct 27, 2009 |
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Supporting Los Alamos National Laboratory's role in the international Center for HIV/AIDS Vaccine Immunology (CHAVI) consortium, researchers are using the Roadrunner supercomputer to analyze vast quantities of genetic sequences ...
Bug splatter on your car's windshield is a treasure trove of genomic biodiversity
Oct 08, 2009 |
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If you have ever taken a long road trip, the windshield of your car will inevitably be splattered with bugs by the time you arrive at your destination. Could the DNA left behind be used to estimate the diversity of insects ...
Key feature of immune system survived in humans, other primates for 60 million years
Aug 18, 2009 |
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A new study has concluded that one key part of the immune system, the ability of vitamin D to regulate anti-bactericidal proteins, is so important that is has been conserved through almost 60 million years of evolution and ...
New fossil tells how piranhas got their teeth
Other Sciences / Archaeology & Fossils
Jun 25, 2009 |
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How did piranhas -- the legendary freshwater fish with the razor bite -- get their telltale teeth? Researchers from Argentina, the United States and Venezuela have uncovered the jawbone of a striking transitional ...
Method for computing evolutionary trees could revolutionize evolutionary biology
Jun 18, 2009 |
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Detailed, accurate evolutionary trees that reveal the relatedness of living things can now be determined much faster and for thousands of species with a computing method developed by computer scientists and a biologist at ...
Amazonian amphibian diversity traced to Andes
Mar 10, 2009 |
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Colorful poison frogs in the Amazon owe their great diversity to ancestors that leapt into the region from the Andes Mountains several times during the last 10 million years, a new study from The University ...
Holding a mirror up to a gibbon’s mind
Mar 04, 2009 |
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(PhysOrg.com) -- University of Queensland developmental psychologists have taken a step into our evolutionary past by studying gibbons.
What are the Chances? Probability Solves an Evolutionary Puzzle
Jan 30, 2009 |
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The origin of species may be almost as random as a throw of the dice. Iosif Pinelis, a professor of mathematical sciences at Michigan Technological University, has worked out a mathematical solution to a biological puzzle: ...
Dinosaur fossils fit perfectly into the evolutionary tree of life
Other Sciences / Archaeology & Fossils
Jan 26, 2009 |
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A recent study by researchers at the University of Bath and London’s Natural History Museum has found that scientists’ knowledge of the evolution of dinosaurs is remarkably complete.
