Navigation Links
Scientists reveal driving force behind evolution
Date:2/25/2010

The team observed viruses as they evolved over hundreds of generations to infect bacteria. They found that when the bacteria could evolve defences, the viruses evolved at a quicker rate and generated greater diversity, compared to situations where the bacteria were unable to adapt to the viral infection.

The study shows, for the first time, that the American evolutionary biologist Leigh Van Valen was correct in his 'Red Queen Hypothesis'. The theory, first put forward in the 1970s, was named after a passage in Lewis Carroll's Through the Looking Glass in which the Red Queen tells Alice, 'It takes all the running you can do to keep in the same place'. This suggested that species were in a constant race for survival and have to continue to evolve new ways of defending themselves throughout time.

Dr Steve Paterson, from the University's School of Biosciences, explains: "Historically, it was assumed that most evolution was driven by a need to adapt to the environment or habitat. The Red Queen Hypothesis challenged this by pointing out that actually most natural selection will arise from co-evolutionary interactions with other species, not from interactions with the environment.

"This suggested that evolutionary change was created by 'tit-for-tat' adaptations by species in constant combat. This theory is widely accepted in the science community, but this is the first time we have been able to show evidence of it in an experiment with living things."

Dr Michael Brockhurst said: "We used fast-evolving viruses so that we could observe hundreds of generations of evolution. We found that for every viral strategy of attack, the bacteria would adapt to defend itself, which triggered an endless cycle of co-evolutionary change. We compared this with evolution against a fixed target, by disabling the bacteria's ability to adapt to the virus.

"These experiments showed us that co-evolutionary interactions between species r
'/>"/>

Contact: Samantha Martin
samantha.martin@liv.ac.uk
01-517-942-248
University of Liverpool
Source:Eurekalert

Page: 1 2

Related biology news :

1. Hormone study gives scientists a sense of how animals bond
2. 78 scientists elected to the American Academy of Microbiology
3. U. of Colorado scientists create tiny RNA molecule with big implications for lifes origins
4. George Daley to discuss challenges and opportunities facing stem cell scientists
5. Scientists unlock mystery in important photosynthesis step
6. Scientists identify critical enzyme in healthy heart function
7. Sanford-Burnham scientists identify natural compound that inhibits cancer cell migration
8. Scientists discover molecular pathway for organ tissue regeneration and repair
9. Scientists synthesize unique family of anti-cancer compounds
10. ASU scientists develop universal DNA reader to advance faster, cheaper sequencing efforts
11. USDA scientists sequence genome of grass that can be a biofuel model crop
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/19/2015)... , May 19, 2015  Technology is rapidly ... internally and in the cloud. Passwords and their management ... of OTP and standards-based specifications such as those developed ... outmoded use of passwords presents for BYOD, COPE, IoT, ... unified biometric identity protocol. In response ...
(Date:5/14/2015)... and Markets ( http://www.researchandmarkets.com/research/5whpxg/fingerprint ) has announced ... Smart Mobile Devices " report to their offering. ... watershed year for fingerprint sensors in smartphones and tablets, ... fingerprint sensors a raison d,etre in the mobile milieu ... must-have feature in flagship smartphones. The key ...
(Date:5/11/2015)...  Through a well-rounded UAS delegation representing private industry, government, ... showing at AUVSI,s Unmanned 2015 conference last week in ... UAS industry met with over 200 hundred people ... the UAS ecosystem. "Our message is clear ... Aerospace Rich Knoll . "If you want to fly ...
Breaking Biology News(10 mins):HYPR Corp. Biometric Security Integration Kit Shields Applications and Devices Across the Internet of Things 2HYPR Corp. Biometric Security Integration Kit Shields Applications and Devices Across the Internet of Things 3Global Smart Mobile Devices Fingerprint Sensors Market 2015-2019: Key Vendors are Authentec, Validity Sensors, Fingerprint Cards, Next Biometrics Group. IDEX, and Qualcomm 2Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2
... the University of Houston for a two-day conference to discuss ... , The UH Texas Obesity Research Center (TORC) ... UH M.D. Anderson Library, Rockwell Pavilion. , "We ... that others will see the wealth of obesity research that ...
... hopeful moms-to-be learn, there are important considerations to the ... environment, regular hormonal injections and the timing of the ... procedure. Now a Tel Aviv University researcher ... look at the role that gravity and other biomechanical ...
... team of scientists led by the UK has been given ... frontiers - an ancient lake hidden deep beneath Antarctica,s ice ... the size of Lake Windermere (UK) may have been ... unique forms of life. The team hopes the exploration will ...
Cached Biology News:Texas Obesity Research Center at UH assembles researchers to discuss obesity 2Engineering bouncing babies, 1 at a time 2Final frontier: Mission to explore buried ancient Antarctic lake given green light 2
(Date:5/21/2015)... , May 21, 2015  Prima Biomed Ltd. ... that is striving to become a leader in the ... recently announced that the final CVac data from the ... a clear trend for a clinically meaningful improvement in ... second remission patients. In the group of ...
(Date:5/21/2015)... Imagine being able to probe and truly ... Being able to read faces and enjoy genuine invisible ... their thoughts and actions like never before. Use ... unique abstract paintings and video, or, play a completely ... as it creates action, dialog, and outcomes based on ...
(Date:5/21/2015)...  CytRx Corporation (NASDAQ: CYTR ), a ... today announced positive updated results from its ongoing ... treatment of unresectable glioblastoma multiforme (GBM), a deadly ... is designed to investigate the preliminary efficacy and ... progressed following prior treatment with surgery, radiation and ...
(Date:5/21/2015)... - RepliCel Life Sciences Inc. (TSX.V: RP) (OTCQB: ... on the development of autologous cell therapies, announced ... Society for Cellular Therapy (ISCT) on RepliCel,s autologous ... a Phase 1/2 clinical trial.  The presentation, taking ... PM to 7:00 PM local time, will review ...
Breaking Biology Technology:Correction Continues after Big Move - BrokerBank Securities, Inc. 25 Days to Meet ARGUS - The World's First Contactless Emotions Scanner 2CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 2CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 3CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 4CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 5CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 6CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 7RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 2RepliCel to Present Unique Autologous Cell Treatment for Achilles Tendinosis at International Society for Cellular Therapy Conference 3
... Va., June 27, 2011 A Continuing Medical Education (CME) ... of key risk factors , will be hosted at the ... 2011 from 8:30am to 1pm. "Beating ... Education credits, is designed to help doctors eradicate this disease ...
... JUPITER, Fla., June 27, 2011 Dyadic International, ... company focused on the discovery, development, manufacture and ... industrial enzyme, bioenergy, and biopharmaceutical industries, announced today ... development and license agreement with a key provider ...
... PharmacoFore, Inc., a privately held biopharmaceutical company developing ... Dr. Joseph Stauffer as Chief Medical Officer & VP, ... Property. Dr. Joseph Stauffer ... Prior to joining PharmacoFore, Dr. Stauffer ...
Cached Biology Technology:Health Diagnostic Laboratory Inc. Sponsors Lecture Series in West Palm Beach, Florida 2Dyadic International Enters Into Research and License Agreement With Major Player in the Animal Feed Industry 2Dyadic International Enters Into Research and License Agreement With Major Player in the Animal Feed Industry 3PharmacoFore, Inc. Announces Appointment of Chief Medical Officer and Vice President of Intellectual Property 2PharmacoFore, Inc. Announces Appointment of Chief Medical Officer and Vice President of Intellectual Property 3PharmacoFore, Inc. Announces Appointment of Chief Medical Officer and Vice President of Intellectual Property 4
... The European Collection of Cell Cultures (ECACC) ... West of the West of England, Bristol, ... the quality control of HER2, oestrogen and ... paraffin wax sections of formalin fixed, breast ...
... Electro-4 design allows "4 gels in one ... possible to run 200,samples or more in ... to four,horizontal gels. To ensure even migration, ... number of gels being run. Ideal for,high ...
Porcine Pulmonary Artery Endothelial Cells (PPAEC) (>500,000 cells)...
... several isoprostanes produced from arachidonic acid during lipid ... the rat. 8-iso PGE2 inhibits U-46619 or I-BOP-induced ... 5 µM, respectively. When infused into the renal ... 4 mg/kg/min, 8-iso PGE2 decreases the GFR and ...
Biology Products: