Navigation Links
Does evolution select for faster evolvers?

It's a mystery why the speed and complexity of evolution appear to increase with time. For example, the fossil record indicates that single-celled life first appeared about 3.5 billion years ago, and it then took about 2.5 billion more years for multi-cellular life to evolve. That leaves just a billion years or so for the evolution of the diverse menagerie of plants, mammals, insects, birds and other species that populate the earth.

New studies by Rice University scientists suggest a possible answer; the speed of evolution has increased over time because bacteria and viruses constantly exchange transposable chunks of DNA between species, thus making it possible for life forms to evolve faster than they would if they relied only on sexual selection or random genetic mutations.

"We have developed the first exact solution of a mathematical model of evolution that accounts for this cross-species genetic exchange," said Michael Deem, the John W. Cox Professor in Biochemical and Genetic Engineering and professor of physics and astronomy.

The research appears in the Jan. 29 issue of Physical Review Letters.

Past mathematical models of evolution have focused largely on how populations respond to point mutations ?random changes in single nucleotides on the DNA chain, or genome. A few theories have focused on recombination ?the process that occurs in sexual selection when the genetic sequences of parents are recombined.

Horizontal gene transfer (HGT) is a cross-species form of genetic transfer. It occurs when the DNA from one species is introduced into another. The idea was ridiculed when first proposed more than 50 years ago, but the advent of drug-resistant bacteria and subsequent discoveries, including the identification of a specialized protein that bacteria use to swap genes, has led to wide acceptance in recent years.

"We know that the majority of the DNA in the genomes of some animal and plant species ?including
'"/>

Source:Rice University


Page: 1 2

Related biology news :

1. Molecular biology fills gaps in knowledge of bat evolution
2. Same mutation aided evolution in many fish species, Stanford study finds
3. Researchers trace evolution to relatively simple genetic changes
4. Family trees of ancient bacteria reveal evolutionary moves
5. Great White shark evolution debate involves WSU Lake Campus geology professor
6. Revolutionary nanotechnology illuminates brain cells at work
7. The evolutionary triumph of flower power
8. MicroRNAs play a big part in gene regulation - and evolution
9. Enlisting genomics to understand flu evolution
10. Variation in HIVs ability to disable host defenses contributes to rapid evolution
11. Scientists track stealth DNA elements in primate evolution
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Does evolution select for faster evolvers

(Date:7/28/2014)... Eight of the top 10 U.S. cities that have ... public inconveniences as frequent road closures, overwhelmed storm drains ... a new NOAA technical report. , This nuisance flooding, ... three U.S. coasts, between 300 and 925 percent since ... Nuisance Flood Frequency Changes around the United States, also ...
(Date:7/28/2014)... identified areas of the Earth that are high priorities ... Europe is particularly vulnerable, as it has the lowest ... of any continent in ,refugia, areas of biological ... remain relatively constant during times of great environmental change. ... in Scandinavia and Scotland. , The biggest refugia ...
(Date:7/28/2014)... Rice University researchers are using magnetic beads and DNA ... be used as microscale models for polymer macromolecules. , ... as theory in the 1950s, can be made as ... of interest to materials scientists who study the basic ... chemical and biomolecular engineer Sibani Lisa Biswal and graduate ...
Breaking Biology News(10 mins):NOAA: 'Nuisance flooding' an increasing problem as coastal sea levels rise 2NOAA: 'Nuisance flooding' an increasing problem as coastal sea levels rise 3Study finds Europe's habitat and wildlife is vulnerable to climate change 2Seeing is bead-lieving 2
... and Drug Administration approved a drug called BiDil as ... claiming in a press release that this was a ... Science, Politics and Big Business Re-create Race in the ... Kirkland & Ellis Professor at Northwestern University School of ...
... responses are some of the most studied behaviors by ... sensory information. The ability to evade predators plays a ... explore their environment to find food, find mates and ... to avoid predators, thereby increasing their chances for survival. ...
... over Niagara Falls. Pollution from fires in Ontario, Canada ... being measured by NASA,s Aqua satellite. One instrument ... two views of the pollution from the fires in ... flies onboard NASA,s Aqua and Terra satellites. MODIS has ...
Cached Biology News:Divided by race 2Elusive prey 2NASA measures wildfire pollution pour over Niagara Falls 2
(Date:7/28/2014)... The global market for biotechnology is ... to a new study by Grand View Research, Inc. ... effective vaccines and drugs in an attempt to improve ... expected to drive market demand over the next six ... via the use of genetically engineered seeds is expected ...
(Date:7/28/2014)... , July 28, 2014 Research and ... Particle Size Analysis Market 2014-2018" report to their offering. ... Particle size analysis is a technique used to determine the ... or liquid. It is crucial to analyze the size of ... Therefore, particle size analysis is performed to determine the behavior ...
(Date:7/25/2014)... 26, 2014 "Ischemic Stroke and ... provides data on the Ischemic Stroke and Cerebral ... information and data relating to the clinical trials ... full global Ischemic Stroke Research Report 2014 at: ... of the trial numbers and their recruitment status ...
(Date:7/25/2014)... by researchers from the University of Leicester has ... unlocking the potential to create new materials using ... been published in the prestigious academic journal ... technique to examine in rich detail the structure ... containing an acetylene molecule and a single helium ...
Breaking Biology Technology:Global Biotechnology Market Worth $604.40 Billion by 2020: Grand View Research, Inc 2Global Biotechnology Market Worth $604.40 Billion by 2020: Grand View Research, Inc 3Global Biotechnology Market Worth $604.40 Billion by 2020: Grand View Research, Inc 4Global Particle Size Analysis Market 2014-2018 2Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 2Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 3Breakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster 2Breakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster 3
... Fang-Fang Wu, Xuemei He, and David R Nau, Bio-Rad Laboratories, Inc., ... Introduction , ... that can be used for the efficient purification ... variety of expression systems. , The synthesis of IMAC ...
... , , ... is one of the key regulatory enzymes , of ... of phosphoenolpyruvate (PEP) to pyruvate and the phosphorylation of ADP , ... aerobic and anaerobic energy metabolism , in invertebrates, regulation ...
... important intracellular signals involved in the, ... factors.The discovery of a phosphatidylinositol, ... the inositol ring uncovered a new pathway ... Phosphoinositide 3-kinase has been purified to, ...
Cached Biology Technology:Rapid Method Development With the BioLogic DuoFlow Chromatography System for the Purification of His-Tagged Proteins 2Rapid Method Development With the BioLogic DuoFlow Chromatography System for the Purification of His-Tagged Proteins 3Rapid Method Development With the BioLogic DuoFlow Chromatography System for the Purification of His-Tagged Proteins 4Purification of Two Isoforms of Pyruvate Kinase from Nordic Krill Using an UNO Q1 Column, Rev A 2Purification of Phosphoinositide 3-Kinase With UNO Columns 2
...
...
Rabbit monoclonal [EP881Y] to EEF2K ( Abpromise for all tested applications). Antigen: Synthetic peptide corresponding to residues in the C-terminal of human EEF2K. Entrez GeneID: 29904 S...
Human Regulatory T cell Staining Kit #2 (w/ APC Foxp3 PCH101, FITC CD4, PE CD25)...
Biology Products: