Navigation Links
Map of life on Earth could be used on Mars

A geologist from Washington University in St. Louis is developing new techniques to render a more coherent story of how primitive life arose and diverged on Earth ?with implications for Mars. Carrine Blank Ph.D., Washington University assistant professor of earth and planetary sciences in Arts & Sciences, has some insight concerning terrestrial microbes that could lead to provocative conclusions about the nature of life on Mars and other planets.

Blank approaches the task by resolving phylogenetic trees. These trees, based upon genetic sequencing data, trace the genetic relationships between what we think of as primitive organisms through trait development. The relationships between early forms of life can illuminate the relationships between organisms present on Earth today ?which fossil evidence and a method called isotopic fractionation have failed to show conclusively.

Blank most recently presented her research at the 2004 annual meeting of the Geological Society of America. Microorganisms can be divided into haves and have-nots: cells of eukaryotes contain a nucleus, while prokaryotic organisms cells do not. Prokaryotic organisms encompass archeal and bacterial domains of life. Archeal organisms diverge further into euryarcheota and Crenarcheota lineages. By piecing together genetic sequences of the three types of prokaryotic organisms, Blank creates a genetic flow chart, which can be interpreted to trace the appearance of environmental adaptations across billions of years of evolution.

Genes are inherited from parents, but can transfer from one organism to another without reproducing by a process called lateral gene transfer. Modular metabolic genes, which are not critical for cell production, account for most lateral gene transfers between microbes.

"There is a lot we're beginning to understand in terms of bacterial evolution that is still not quite clear, " Blank said. "What we're trying to resolve is the evolutionary histo
'"/>

Source:Washington University in St. Louis


Page: 1 2 3

Related biology news :

1. UCSB scientists probe sea floor venting to gain understanding of early life on Earth
2. U.N. mulls the protection of Earths forests
3. ORNL, UC Berkeley unravel real-world clues to Earths mysteries
4. Study casts doubt on Snowball Earth theory
5. Evolution of life on Earth may hold key to finding life in outer space
6. Bacteria which sense the Earths magnetic field
7. New study pinpoints epicenters of Earths imminent extinctions
8. Understanding the oceans microbes is key to the Earths future
9. NASAs AURA satellite peers into Earths ozone hole
10. New maps reveal true extent of human footprint on Earth
11. Embryos tell story of Earths earliest animals
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Map life Earth could used Mars

(Date:4/23/2014)... contribute to early fetal death according to a new ... Children,s Hospital Los Angeles and Ulaanbaatar, Mongolia the ... paper published today in the journal BMC Pregnancy ... between seasonal ambient air pollutants and pregnancy loss in ... the highest levels of air pollution of all world ...
(Date:4/23/2014)... Like a hungry diner ripping open a dinner roll, ... must tear open a hydrogen molecule. Now researchers have ... the two halves of its hydrogen feast. The view ... make the catalyst work better for alternative energy uses. ... shown precisely where the hydrogen halves end up in ...
(Date:4/23/2014)... research shows that male black widow spiders prefer their ... example of mate preference by male spiders. ... and Maydianne Andrade, a professor in UTSC,s Department of ... the wild that males overwhelmingly chose to mate with ... can tell whether a potential mate is well-fed and ...
Breaking Biology News(10 mins):Pollutants from coal-burning stoves strongly associated with miscarriages in Mongolia 2Halving hydrogen 2Halving hydrogen 3Halving hydrogen 4Picky male black widow spiders prefer well-fed virgins 2
... Nadeau, PhD, of Case Western Reserve University School of ... (NIH) Director,s Pioneer Award. One of 17 ... investigate transgenerational genetic effects, where the biological features and ... depend as much on the genetics of ancestral generations ...
... A 15-year experiment in an outdoor "laboratory" on Ohio ... just as many, if not more, ecological services as will ... been comparing the behavior of two experimental marshes on the ... and another that was left to colonize plant and animal ...
... in Spanish . A beneficial yeast that ... the fungal culprit behind Fusarium head blight ("scab"). U.S. ... isolated an improved variant of the yeast Cryptococcus flavescens ... as a biocontrol agent. In susceptible wheat and ...
Cached Biology News:Case Western Reserve geneticist receives prestigious NIH Director's Pioneer Award 2Planted, unplanted man-made wetlands are similar at year 15, and function as effective carbon sinks 2Planted, unplanted man-made wetlands are similar at year 15, and function as effective carbon sinks 3Planted, unplanted man-made wetlands are similar at year 15, and function as effective carbon sinks 4Flower-dwelling yeast licensed for use against scab disease 2
(Date:1/15/2014)... DTS Language Services, Inc . is pleased ... Life Science organizations who need document translations. Clients will ... their documents in advance with a selection of nearly 50 ... often a critical factor in clinical and scientific fields, and ...
(Date:1/15/2014)... 15, 2014 AudioNotch is the internet's ... for the treatment of tinnitus. Patients listen to sound ... over a period of weeks to months, their tinnitus volume ... two forms: Notched Music and Notched White Noise. Now, AudioNotch ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Carahsoft and ... Thursday, January 23, 2014 at 2pm EST (11am PST), ... The topic focuses on how technology can turn raw, ... decisions for government agencies. The online webinar will last ...
(Date:1/14/2014)... , Jan. 14, 2014 As pet owners drew up ... many of them wrote: "Take better care of my furry companion." ... designer clothes and top-brand carrying cases to take the little canine ... might also feel compelled to buy some pricey toys at the ...
Breaking Biology Technology:DTS Improves Efficiency for Life Science Document Translations 2Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2
... loss is a major cause of death from roadside bombs ... for people age 4 to 44, often overwhelms the body,s ... natural process, a team led by Erin Lavik, a new ... doctoral student, James P. Bertram, built synthetic platelets that show ...
... Care at Hahnemann among the Best in the Nation ... it has been granted Magnet(R) recognition by the American Nurses ... the highest levels of recognition a hospital or medical center ... hospitals in the country that have achieved this prestigious distinction. ...
... , , , , WALTHAM, ... world,s leading research and advisory firms for pharmaceutical and ... dermatologists, Centocor Ortho Biotech/Janssen-Cilag,s Stelara and Abbott,s briakinumab (both ... share in 2012 in the drug market for moderate ...
Cached Biology Technology:Researchers take the inside route to halt bleeding 2Hahnemann University Hospital Granted Magnet(R) Status 2Hahnemann University Hospital Granted Magnet(R) Status 3In 2012, Stelara and Briakinumab Will Capture 22 Percent of the Biologics Share in the Moderate to Severe Psoriasis Drug Market 2In 2012, Stelara and Briakinumab Will Capture 22 Percent of the Biologics Share in the Moderate to Severe Psoriasis Drug Market 3