Navigation Links
Family trees of ancient bacteria reveal evolutionary moves

A geomicrobiologist at Washington University in St. Louis has proposed that evolution is the primary driving force in the early Earth's development rather than physical processes, such as plate tectonics.

Carrine Blank, Ph.D., Washington University assistant professor of geomicrobiology in the Department of Earth & Planetary Sciences in Arts & Sciences, studying Cyanobacteria ?bacteria that use light, water, and carbon dioxide to produce oxygen and biomass ?has concluded that these species got their start on Earth in freshwater systems on continents and gradually evolved to exist in brackish water environments, then higher salt ones, marine and hyper saline (salt crust) environments.

Cyanobacteria are organisms that gave rise to chloroplasts, the oxygen factory in plant cells. A half billion years ago Cyanobacteria predated more complex organisms like multi-cellular plants and functioned in a world where the oxygen level of the biosphere was much less than it is today. Over their very long life span, Cyanobacteria have evolved a system to survive a gradually increasing oxidizing environment, making them of interest to a broad range of researchers.

Blank is able to draw her hypothesis from family trees she is drawing of Cyanobacteria. Her observations are likely to incite debate among biologists and geologists studying one of Earth's most controversial eras ?approximately 2.1 billion years ago, when cyanobacteria first arose on the Earth. This was a time when the Earth's atmosphere had an incredible, mysterious and inexplicable rise in oxygen, from extremely low levels to 10 percent of what it is today. There were three ?some say four ?global glaciations, and the fossil record reflects a major shift in the number of organisms metabolizing sulfur and a major shift in carbon cycling.

"The question is: Why?" said Blank. "My contribution is the attempt to find evolutionary explanations for these major changes. There were lots of evo
'"/>

Source:Washington University in St. Louis


Page: 1 2 3

Related biology news :

1. Poplar trees redirect resources in response to simulated attack
2. Alien woodwasp, threat to US pine trees, found in N.Y.
3. Shade trees getting scorched by plant disease
4. Seeing the forest and the trees
5. Why Christmas trees are not extinct
6. Amazon trees much older than assumed, raising questions on global climate impact of region
7. Underdogs in the understory: Study suggests nature favors rarer trees
8. Of mice, men, trees and the global carbon cycle
9. Genome info from plant destroyers could save trees, beans and chocolate
10. Mystery of fossilized trees is solved
11. How trees manage water in arid environments
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Family trees ancient bacteria reveal evolutionary moves

(Date:12/10/2014)... 2014 CIE San Diego has launched an ... connective tissue that enhances care coordination among social service ... client-level information; earned a second $1 million grant from ... seniors aging in community and; will be recognized as ... th 4-6p. CIE San Diego today ...
(Date:12/5/2014)... VIEW, Calif. , Dec. 4, 2014 /PRNewswire/ ... safety has boosted investments in new testing and ... has also given rise to a range of ... by the requirements of Generation Y, which is ... technologies. As a result, product development strategies of ...
(Date:12/3/2014)... , Dec. 2, 2014   Marvin ... deployed, innovative test solutions for military, aerospace, and ... version of its successful TS-900 PXI semiconductor ... and features of high-end systems to customers at ... value compared to traditional ATE. ...
Breaking Biology News(10 mins):Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3
... History Museum have again discovered infant dinosaur footprints in ... of Morrison. Dating from the Late Jurassic, some 148 ... Rocky Mountains rose, when Morrison was a broad savanna ... sauropods, according to discoverer Matthew Mossbrucker, the museum,s director. ...
... if you,re physically fit, you,re less likely to get a ... that some people are "naturally" in better shape than others, ... for disease risk and drug effectiveness in animal models. A ... of The FASEB Journal ( http://www.faseb.org ) started ...
... light on yeast and mammalian cells in her Duke University lab ... the result of a light-activated switch from a plant that has ... "on-off switch" to control cell growth or death, grow new tissue ... an assistant research professor in the biology department at Duke. ...
Cached Biology News:Morrison Natural History Museum discovers baby sauropod tracks 2Morrison Natural History Museum discovers baby sauropod tracks 3New strain of 'high-runner' rats uniquely resistant to disease -- all disease! 2Researchers could use plant's light switch to control cells 2
(Date:12/24/2014)... NEW YORK , Dec. 24, 2014 ... biopharmaceutical company advancing patient care in critical areas, announced ... shares of common stock, and warrants to purchase up ... an offering price of $4.00 per share and $.01 ... price of $5.00, are exercisable immediately, and expire 5 ...
(Date:12/24/2014)... 23, 2014 GMO corn cases filed ... Syngenta, are in the process of being consolidated in ... case is In Re: Syngenta AG MIR 162 Corn ... for the District of Kansas. , Management of the ... over to U.S. District Judge John W. Lungstrum.* , ...
(Date:12/24/2014)... 23, 2014 According to Ross Selinger, President ... of ITRA Global, the national office market continues to be ... This is evidenced by the third quarter’s surprising 3.9% GDP, ... Low energy costs have held inflation down and the Fed ... the housing market remaining soft. , This solid economic news ...
(Date:12/24/2014)... Diego, CA (PRWEB) December 23, 2014 ... where their Twitter followers can submit their #HolidayInTheLab ... themselves and their lab mates. , For those struggling ... lab mates, the Pipette.com Holiday in the Lab Contest ... Pipette.com Twitter followers to send pictures of ...
Breaking Biology Technology:PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3Major Pipette Distributor Pipette.com Announces their Holiday in the Lab Contest 2
... still have another two months of waiting for the new ... their eyes now on the first movie ever of carbon ... that graphene single-layered sheets of carbon atoms arranged like ... of the electronics industry, the audience for this new science ...
... Central Texas man receives groundbreaking therapy days after heart ... On March 30, the Heart Hospital of Austin ... a groundbreaking Phase II study designed to test the ... to repair damaged heart tissue after a heart attack. ...
... many more to attend global event for health care leaders ... Washington , D.C. ... Care Congress, April 14-16, Washington, D.C., is pleased to announce ... meet with top health leaders from the United States and ...
Cached Biology Technology:Spring 'blockbuster' movie now showing 2Spring 'blockbuster' movie now showing 3Spring 'blockbuster' movie now showing 4Spring 'blockbuster' movie now showing 5Heart Hospital of Austin First Site in World to Test Efficacy of New Adult Stem Cell Therapy to Treat Damaged Heart Tissue in Phase II Trial 2Health Care Innovations and Opportunities Attract Attendees from 40 Countries and Delegations from 12 to 6th Annual World Health Care Congress 2
Reacts with methylated DNA from plants and vertebrates...
Mouse monoclonal [GB3] to Kalinin ( Abpromise for all tested applications). entrezGeneID: 3918 SwissProtID: Q13753...
Rabbit polyclonal to Tryptophanyl tRNA synthetase ( Abpromise for all tested applications). Antigen: Recombinant full length protein (Human): Tryptophanyl tRNA synthetase Entrez Gene ID: 745...
Mouse monoclonal [CIa] to Ia Antigen (Biotin) ( Abpromise for all tested applications)....
Biology Products: