News tagged with evolutionary time
Not a one-way street: Evolution shapes environment of Connecticut lakes
Environmental change is the selective force that preserves adaptive traits in organisms and is a primary driver of evolution. However, it is less well known that evolutionary change in organisms also trigger ...
May 23, 2012 |
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New study traces the evolutionary history of what mammals eat
The feeding habits of mammals haven't always been what they are today, particularly for omnivores, finds a new study.
Apr 16, 2012 |
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Huge hamsters and pint-sized porcupines thrive on islands
From miniature elephants to monster mice, and even Hobbit-sized humans, size changes in island animals are well-known to science. Biologists have long believed that large animals evolving on islands tend to get smaller, while ...
Mar 23, 2012 |
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Sympatric speciation contributes to island biodiversity
Scientists discover at least 11 examples of sympatric speciation on Lord Howe Island.
Mar 15, 2012 |
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Amoeba offers key clue to photosynthetic evolution
(PhysOrg.com) -- The major difference between plant and animal cells is the photosynthetic process, which converts light energy into chemical energy. When light isn't available, energy is generated by breaking ...
Feb 27, 2012 |
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World nourishment at risk of being diminished: Wild cereals threatened by global warming
A 28-year comparative study of wild emmer wheat and wild barley populations has revealed that these progenitors of cultivated wheat and barley, which are the best hope for crop improvement, have undergone changes over this ...
Feb 23, 2012 |
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Chromosome number changes in yeast
Researchers from Trinity College Dublin have uncovered the evolutionary mechanisms that have caused increases or decreases in the numbers of chromosomes in a group of yeast species during the last 100-150 million years. The ...
Jul 21, 2011 |
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New study finds link between marine algae and whale diversity over time
A new paper by researchers at George Mason University and the University of Otago in New Zealand shows a strong link between the diversity of organisms at the bottom of the food chain and the diversity of mammals at the top.
Feb 19, 2010 |
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Sequencing effort to chart ants and their ecosystem
(PhysOrg.com) -- Nestled within the twisting fungus gardens of leaf-cutter ants exists a complex symbiotic web that has evolved over millions of years. Now, with the help of a major genomic sequencing grant ...
Jun 26, 2009 |
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Sinister business: Lefties have evolutionary boon
Under Darwinian pressure, genes that don't help the struggle to survive get squeezed out of the genetic code, leaving the ones that are fitter.
Feb 27, 2009 |
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Census of modern organisms reveals echo of ancient mass extinction
Paleontologists can still hear the echo of the death knell that drove the dinosaurs and many other organisms to extinction following an asteroid collision at the end of the Cretaceous Period 65 million years ...
Other Sciences / Archaeology & Fossils
Feb 05, 2009 |
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