Navigation Links
Evolution drives many plants and animals to be bigger, faster
Date:3/7/2011

Durham, NC For the vast majority of plants and animals, the 'bigger is better' view of evolution may not be far off the mark, says a new broad-scale study of natural selection. Organisms with bigger bodies or faster growth rates tend to live longer, mate more and produce more offspring, whether they are deer or damselflies, the authors report.

Researchers working at the National Evolutionary Synthesis Center compiled and reviewed nearly 150 published estimates of natural selection, representing more than 100 species of birds, lizards, snakes, insects and plants. The results confirm that for most plants and animals, larger body size and earlier seasonal timing such as earlier breeding, blooming or hatching confer significant survival advantages.

"It's a very widespread pattern," said co-author Joel Kingsolver of the University of North Carolina at Chapel Hill.

What's puzzling, the authors say, is not why the 'bigger is better' model of evolution is so common, but why the 'Goldilocks' model is so rare: If organisms are supposedly well-adapted to their particular circumstances, then why is it so seldom the case that the individuals that survive and reproduce the best are the ones that are not too small, nor too big, but just right?

A classic example is human birth weight. Newborns of intermediate size are more likely to survive than newborns that are extremely large or extremely small. In lieu of driving organisms to be bigger and faster over time, the 'Goldilocks' model also known as stabilizing selection favors moderation, the authors explained. But for the vast majority of organismal traits, this pattern is the exception, not the rule. "Rarely is it the case that the individuals that survive and reproduce the best are the ones in the middle," Kingsolver said.

The result is puzzling because the conventional wisdom is that most creatures are well adapted to the environments in which they live. "When we look at na
'/>"/>

Contact: Robin Ann Smith
rsmith@nescent.org
919-668-4544
National Evolutionary Synthesis Center (NESCent)
Source:Eurekalert

Page: 1 2

Related biology news :

1. Worm genome offers clues to evolution of parasitism
2. Advance offers revolution in food safety testing
3. Mass extinctions and the evolution of dinosaurs
4. Egalitarian revolution in the Pleistocene?
5. Reproducing early and often is the key to rapid evolution in plants
6. Illuminating biology: An evolutionary perspective
7. Biologists, educators recognize excellence in evolution education
8. Revealing the evolutionary history of threatened sea turtles
9. Details of evolutionary transition from fish to land animals revealed
10. Genetic based human diseases are an ancient evolutionary legacy
11. Wake Forest plays integral role in effort to revolutionize vehicle safety
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/18/2014)... wildlife while feeding a world population predicted to ... holistic approach to conservation that considers human-altered landscapes ... Wildlife and the natural habitat that supports it ... world where at least three-quarters of the land ... rest is vulnerable to human-caused impacts such as ...
(Date:4/18/2014)... sprout as soon as they,re planted may be good news ... careful. In the wild, a plant whose seeds sprouted at ... More than just an insurance policy against late frosts or ... long-term advantages too: Plants whose seeds put off sprouting ... finds in a team of researchers working at the National ...
(Date:4/17/2014)... COLUMBIA, Mo. April 17 In the most densely ... States, forests reflect two centuries of human needs, values ... logging and clearing forests for agriculture and development, have ... today, a U.S. Forest Service study reports. , The ... forest conditions and management needs in the Northern United ...
Breaking Biology News(10 mins):Stanford researchers rethink 'natural' habitat for wildlife 2Stanford researchers rethink 'natural' habitat for wildlife 3Stanford researchers rethink 'natural' habitat for wildlife 4Plants with dormant seeds give rise to more species 2Five anthropogenic factors that will radically alter northern forests in 50 years 2Five anthropogenic factors that will radically alter northern forests in 50 years 3
... channel has shown that a carpet of freeze-dried microbes that ... after water was diverted into it, said a University of ... resilience of life in the harsh polar environment, where temperatures ... melt water flows for only five to 12 weeks annually, ...
... showed that a fruit fly gene is crucial for ... how the transformation initially proceeds. Understanding this process in ... teenagers. , When the DHR4 gene is disabled, fruit ... to a sexually active adult. It is the first ...
... link between two biochemical pathways that plants use to ... believed worked independently of each other. , Knowing how ... researchers breed plants that can better resist a variety ... and an assistant professor of horticulture and crop science ...
Cached Biology News:Freeze-dried mats of microbes awaken in Antarctic streambed 2Freeze-dried mats of microbes awaken in Antarctic streambed 3Scientists find a maturity gene in fly 2Scientists find a maturity gene in fly 3Scientists find a maturity gene in fly 4Study: Plants use dual defense system to fight pathogens 2
(Date:1/15/2014)... 15, 2014 Two champions of science, ... sponsorship of an annual competition for middle and high ... to, innovative STEM study. The competition presents students with ... of Engineering Aptitude, Mathematics, and Sciences is a ...
(Date:1/15/2014)... 15, 2014 Freeslate, Inc ., ... announced that Lupin Limited, one of India’s top five ... Protégé PharmD System for high throughput solid form ... focused on a wide range of quality, affordable generic ...
(Date:1/14/2014)... 2014 Carahsoft and CDS Federal Services ... 2014 at 2pm EST (11am PST), “Natural Language Processing: ... on how technology can turn raw, heterogeneous data into ... agencies. The online webinar will last approximately one hour. ...
(Date:1/14/2014)... 14, 2014 EquitiesIQ, a leading informational ... ALQA). Alliqua is an emerging biomedical company acquiring, developing, ... care market. , Free report download: http://equitiesiq.com/reports/alliqua/ ... seasoned management team and Board, which launched the company’s ...
Breaking Biology Technology:Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... 28 US Oncology, Inc. will announce its financial results ... 7, 2009.A conference call and simultaneous webcast will be hosted ... earnings release. Additional information will be available on the company,s ... Room on the day of the earnings announcement. US/Canada Dial-in ...
... prove efficacious for both prophylactic and therapeutic ... (NYSE AMEX: CVM ) announced ... vaccines utilizing its proprietary L.E.A.P.S.(TM) (Ligand Epitope ... induce protection against illnesses such as swine ...
... ST. LOUIS, April 28 Sigma-Aldrich (Nasdaq: ... esiRNA, a pool of gene-specific siRNA that provides a novel ... traditional synthetic RNAi, esiRNA ( http://www.sigma.com/esirna ... single gene target. This new tool is designed to eliminate ...
Cached Biology Technology:US Oncology to Report 2009 First Quarter Operating Results 2CEL-SCI's L.E.A.P.S. Technology Shows Potential to Treat Swine Influenza in Preclinical Studies 2CEL-SCI's L.E.A.P.S. Technology Shows Potential to Treat Swine Influenza in Preclinical Studies 3Sigma-Aldrich Introduces MISSION(R) esiRNA for Low Cost, High Specificity Pooled RNAi Screening 2Sigma-Aldrich Introduces MISSION(R) esiRNA for Low Cost, High Specificity Pooled RNAi Screening 3Sigma-Aldrich Introduces MISSION(R) esiRNA for Low Cost, High Specificity Pooled RNAi Screening 4
... For separation and fractionation ... separation of nuclei from cytosolic ... sample complexity, greatly facilitating study ... of nucleic acid binding proteins ...
... is an isotonic, balanced salt solution. It is ... the storage of whole blood at refrigerator temperatures ... volume of blood is collected into a container ... The solution is placed in a refrigerator at ...
... Hollandes is a fixative useful for routine ... It is stable and will decalcify small ... Hollande's can be stained successfully with most ... solution stabilizes red blood cell membranes and ...
... XS uniquely combines a single-channel sample processing ... 8-channel bulk reagent dispenser all in one ... using disposable pipette tips, the Precision XS ... dispenser is available for transferring larger volumes. ...
Biology Products: