Navigation Links
Close family ties keep microbial cheaters in check, study finds
Date:12/16/2011

Any multicellular animal, from a blue whale to a human being, poses a special challenge for evolution.

Most of the cells in its body will die without reproducing; only a privileged few will pass their genes to the next generation.

How could the extreme degree of cooperation required by multicellular existence actually evolve? Why aren't all creatures unicellular individualists determined to pass on their own genes?

Joan Strassmann and David Queller, evolutionary biologists at Washington University in St. Louis, provide an answer in this week's issue of the journal Science.

Experiments with amoebae that usually live as individuals, but must also join with others to form multicellular bodies to complete their life cycles, show that cooperation depends on kinship.

If amoebae occur in well-mixed cosmopolitan groups, cheaters will always be able to thrive by free-loading on their cooperative neighbors.

But if groups derive from a single cell, cheaters will usually occur in all-cheater groups and will have no cooperators to exploit.

The only exceptions are brand new cheater mutants in all-cooperator groups, and these could pose a problem if the mutation rate is high enough and there are many cells in the group to mutate.

The scientists calculated just how many times amoebae that arose from a single cell can safely divide before cooperation degenerates into a free-for-all.

The answer turns out to be 100 generations or more.

Population bottlenecks that kill off diversity and restart the population from a single cell are powerful stabilizers of cellular cooperation, the scientists conclude.

"The leap from single-celled organisms to multicelled ones was a critical step in the history of life that paved the way for the world's plants and animals, including humans," says Sam Scheiner, program director in the National Science Foundation's (NSF) Division of Environmenta
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. Researchers closer to the super bug puzzle
2. Underage drinking among close friends high indicator of future alcohol use by black teens
3. Ready for their close-up
4. Lung regeneration closer to reality with new discovery by Weill Cornell Medical College researchers
5. Scientists move closer to predicting who will and will not fight off severe infections
6. Close up look at a microbial vaccination program
7. New threat closes in on iconic Galápagos wildlife
8. New discovery brings customized tuberculosis therapies based on genotype closer to reality
9. Discovery of natural antibody brings a universal flu vaccine a step closer
10. Scientists a step closer to understanding natural antifreeze molecules
11. IOF calls for improved strategies to close the treatment gap and reduce future burden of fractures
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Close family ties keep microbial cheaters in check, study finds
(Date:8/19/2014)... 19 August 2014: An engineer at the University of ... having a brain to communicate with the body. , ... L Mahadevan, has developed a mathematical model for earthworms ... how these soft bodied animals get around. , The ... pattern generator (CPG) which states that the central brain ...
(Date:8/19/2014)... This news release is available in French . ... Stand: balancing the BENEFITS and RISKS of physical activity ... a stand on the promotion of childhood physical activity ... Applied Physiology, Nutrition, and Metabolism ( APNM ... of knowledge in the area of risk of physical ...
(Date:8/19/2014)... 9- and 10-year-olds finds that those who are more ... in the brain than their peers who are less ... carry nerve signals from one brain region to another. ... more efficient nerve activity. , The team reports ... Neuroscience. , "Previous studies suggest that children with ...
Breaking Biology News(10 mins):Secrets of how worms wriggle uncovered 2Taking a stand: Balancing the BENEFITS and RISKS of physical activity in children 2Taking a stand: Balancing the BENEFITS and RISKS of physical activity in children 3Physically fit kids have beefier brain white matter than their less-fit peers 2Physically fit kids have beefier brain white matter than their less-fit peers 3
... identify thousands of different items by scanning the tiny ... Cornell University could make it just as easy to ... interest by tagging them with color-coded probes made out ... by Dan Luo, Cornell assistant professor of biological engineering, ...
... the University of Alberta have discovered that chickens raised ... the nutrients they eat towards themselves or their eggs. ... for producers who must figure out how to deal ... egg production into their own bodies. "They like to ...
... regulates the body's main biological clocks also may play ... Southwestern Medical Center have found. , The Clock gene ... and wakefulness, body temperature, hormone levels, blood pressure and ... of the brain's reward system. , UT Southwestern researchers ...
Cached Biology News:Tagging pathogens with synthetic DNA 'barcodes' 2Tagging pathogens with synthetic DNA 'barcodes' 3What comes first…the chicken, the egg, or the bad attitude? 2Gene controlling circadian rhythms linked to drug addiction 2
(Date:8/20/2014)... 20, 2014 Not long ago, it ... should be performed late in the development cycle – ... current regulatory trends suggest that, like many things GxP, ... In recent years, multiple drug sponsors have been required ... specific questions during phase I/II. It’s not only clinical ...
(Date:8/20/2014)... Aug. 20, 2014 /PRNewswire-iReach/ -- A case study ... between the school,s bioengineering department and the Intel® ... Intel® Software Academic Program, UCSD,s research focuses on ... human body.  Photo - ... the work of Dr. Todd P. Coleman ...
(Date:8/20/2014)... could improve the health of your heart, researchers have ... used a standard TENS machine like those designed to ... tragus, the small raised flap at the front of ... , The stimulation changed the influence of the nervous ... that can drive failing hearts too hard. , Professor ...
(Date:8/20/2014)... Cranford, NJ (PRWEB) August 20, 2014 ... solutions, announced today that it has expanded its myPROpad™ ... of the EQ-5D-5L, one of the most widely ... for measuring general health status. The EQ-5D is used ... to generate a measure that can be used to ...
Breaking Biology Technology:Are Extractable and Leachables going Phase-Appropriate? New Webinar Hosted by Xtalks 2Intel and University of San Diego Bioengineering Department Release Case Study on Health Sciences Research 2'Tickling' your ear could be good for your heart 2EQ-5D™ Assessment Now Available for iPad 2
... at 27th Annual J.P. Morgan Healthcare Conference -REDWOOD CITY, ... GHDX ) announced today that it has initiated ... DX(R) colon cancer assay. Utilizing more than 1,200 ... study will use prospectively defined endpoints to assess the ...
... WaferGen Biosystems,Inc. (OTC Bulletin Board: WGBS), a ... biology and stem cell research systems, today,announced ... of the company,s SmartChip(TM) Real-Time PCR System ... alpha testing program. Initial tests,conducted at ...
... Trial conducted by Novartis to evaluate safety and efficacy ... ribavirin in patients with genotypes 2 and 3 hepatitis ... Inc. (Nasdaq: HGSI ) today announced that ... that will evaluate the safety and efficacy of Albuferon(R) ...
Cached Biology Technology:Genomic Health Announces Commencement of QUASAR Clinical Validation Study for Oncotype DX(R) Colon Cancer Assay 2Genomic Health Announces Commencement of QUASAR Clinical Validation Study for Oncotype DX(R) Colon Cancer Assay 3Genomic Health Announces Commencement of QUASAR Clinical Validation Study for Oncotype DX(R) Colon Cancer Assay 4Genomic Health Announces Commencement of QUASAR Clinical Validation Study for Oncotype DX(R) Colon Cancer Assay 5WaferGen's SmartChip(TM) System Performance Successfully Demonstrated in Initial Phase of Alpha Testing Program 2WaferGen's SmartChip(TM) System Performance Successfully Demonstrated in Initial Phase of Alpha Testing Program 3WaferGen's SmartChip(TM) System Performance Successfully Demonstrated in Initial Phase of Alpha Testing Program 4WaferGen's SmartChip(TM) System Performance Successfully Demonstrated in Initial Phase of Alpha Testing Program 5Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 2Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 3Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 4Human Genome Sciences Announces Initiation of Phase 2b Trial of Albuferon(R) Dosed Monthly in Chronic Hepatitis C 5
... cDNA Library Panels were designed for full-length ... of PCRs to identify the desired cDNA ... in a 96-well "Master Plate," where each ... Having identified the positive well(s) by gel ...
... The Rapid-Screen cDNA Library Panels were designed ... three sets of PCRs to identify the ... is performed in a 96-well "Master Plate," ... 5,000 clones. Having identified the positive well(s) ...
... The ES Cell Characterization Kit consists ... activity determination as well as four ES ... (including controls). • Stem cells have become ... due to their therapeutic potential and because ...
... by a modification of the procedure ... Bioeng., 11 , 1055 ... yield an A 260 of ... (1 cm light path). Physical Form: ...
Biology Products: