Navigation Links
Geobiologists propose that the earliest complex organisms fed by absorbing ocean buffet
Date:8/19/2009

Blacksburg, Va. -- Research at Virginia Tech has shown that the oldest complex life forms -- living in nutrient-rich oceans more than 540 million years ago likely fed by osmosis.

The researchers studied two groups of modular Ediacara organisms, the fern-shaped rangeomorphs and the air mattress-shaped erniettomorphs. These macroscopic organisms, typically several inches in size, absorbed nutrients through their outer membrane, much like modern microscopic bacteria, according to the cover story of the Aug. 25, 2009 issue of the Proceedings of the National Academy of Sciences (PNAS), "Osmotrophy in modular Edicara organisms," by Marc Laflamme, Shuhai Xiao, and Michal Kowalewski. Laflamme, now a Postdoctoral Fellow in the Department of Geology and Geophysics at Yale University, did the research as a postdoc in Xiao's lab at Virginia Tech. Xiao and Kowalewski are professors of geobiology in the College of Science at Virginia Tech.

The rangeomorphs had a repeatedly branching system like fern leaves and the erniettomorphs had a folded surface like an inflated air mattress to make tubular modules. "These organisms are unlike any life forms since and so are poorly understood," said Laflamme.

Their feeding strategy has been a topic of controversy, with theories ranging from parasitism to symbiosis to photosynthesis. "Some hypotheses can be ruled out because the organisms lack feeding structures, such as tentacles or mouths, and because many of them lived in the deep ocean where there was no sunlight for photosynthesis" said Xiao.

The researchers decided to simulate various morphological changes in the overall construction of the organisms to test whether it would have been possible for them to attain surface area to volume ratios on the same order as modern bacteria that feed by osmosis. Theoretical models were constructed to explore the effects of length, width, thickness, number of modules, and presence of internal vacuoles,
'/>"/>

Contact: Susan Trulove
STrulove@vt.edu
540-231-5646
Virginia Tech
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Caltech geobiologists discover unique magnetic death star fossil
2. A study proposes a new universal rule to explain the equilibrium of plant populations
3. Alternative methods proposed to detect pesticides and antibiotics in water and natural food
4. A study proposes a new universal rule to explain the equilibrium of plant populations
5. New hope for horse lovers as effective control for killer ragwort is proposed
6. Study proposes new theory of how viruses may contribute to cancer
7. Environmental researchers propose radical human-centric map of the world
8. New hypothesis for origin of life proposed
9. NOAA proposes federal regulations to protect black abalone
10. Purdue researchers propose way to incorporate deforestation into climate change treaty
11. NOAA proposes rule to prevent commercial harvesting of krill
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/31/2015)... 31 de julio de 2015 La 10 th ... celebrará por medio de BGI del 22 al 25 de octubre ... Este año, la conferencia celebra su décimo aniversario. ... convertido en una de las reuniones anuales más influyentes del ... las reuniones más dinámicas, entusiastas y mejores a nivel científico. ...
(Date:7/31/2015)... , Jul. 31, 2015 NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market and ... has filed provisional patent 62/198989 for ELECTRONIC ... highlights a method to advance crypto-currencies such as Bitcoin ... a common, uniform way to manage all payments.  ...
(Date:7/30/2015)... Calif. , July 30, 2015 ... services for gene function analysis and biomarker discovery, ... RNA (sgRNA) Knockout Library targeting all human protein ... and permanently "knock out" a gene,s function. Cellecta,s ... a high throughput screening tool so that researchers ...
Breaking Biology News(10 mins):La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 2La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 3NXT-ID Patents Electronic Crypto-Currency Management Technology 2NXT-ID Patents Electronic Crypto-Currency Management Technology 3NXT-ID Patents Electronic Crypto-Currency Management Technology 4CELLECTA, INC. Announces Launch of Human Whole Genome CRISPR Knockout Library 2
... and Ohio State University will battle for the BCS ... week, but if the game was held in the ... halftime. Louisianas wetlands are being lost at the rate ... fight against this rapid destruction, the two universities joined ...
... Creditors are Subject to Identity Theft Red Flag, Legislation ... 1, 2008, BRENTWOOD, Tenn., Jan. 2 With ... of FACTA (Fair and Accurate Transactions Act),also known as ... scrambling to create a written plan for detecting and,responding ...
... Ohio State University have found that the number of copies ... cancer in a mouse model. Publishing in the Jan. 3 ... or Down syndrome in humans, can repress tumor growth. ... whether people with Down syndrome develop cancer less often than ...
Cached Biology News:LSU and Ohio State battle on football field, collaborate in research field 2NXG Strategies Launches Nation's First Website Dedicated to Red Flag Compliance 2Gene dose affects tumor growth 2
(Date:8/26/2015)... ... August 26, 2015 , ... ... today that a second US laboratory is to open in Manhattan, Kansas in ... continued partnership and long-term growth of research and development through collaboration with researchers ...
(Date:8/26/2015)... 26, 2015  The Diabetes Research Institute (DRI), ... Miami Miller School of Medicine, announced today that ... test for the first time a novel transplant ... FDA approved Phase I/II study builds upon decades ... an important first step toward the development of ...
(Date:8/26/2015)... -- China Cord Blood Corporation (NYSE: CO ) ... of cord blood collection, laboratory testing, hematopoietic stem cell ... the Company has been informed that Magnum Opus 2 ... Mr. Yuen Kam, chairman of the board of directors ... "Shares") of  Excellent China Healthcare Investment Limited ("KKR SPV") ...
(Date:8/26/2015)... (PRWEB) , ... August 26, 2015 , ... The 2015 ... Boston adult stem cell technology start-up company Asymmetrex to share the first ... capabilities of a new biomarker for counting adult tissue stem cells. , With a ...
Breaking Biology Technology:MediVet Biologics Animal Health Secures Additional Laboratory Facility in Manhattan, Kansas 2MediVet Biologics Animal Health Secures Additional Laboratory Facility in Manhattan, Kansas 3Diabetes Research Institute Successfully Transplants First Patient In Pilot BioHub Trial 2Diabetes Research Institute Successfully Transplants First Patient In Pilot BioHub Trial 3Diabetes Research Institute Successfully Transplants First Patient In Pilot BioHub Trial 4China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 3Asymmetrex Reports Positive Indicators for Crowdsourcing Campaign to Evaluate New Biomarker for Counting Adult Tissue Stem Cells for the First Time 2Asymmetrex Reports Positive Indicators for Crowdsourcing Campaign to Evaluate New Biomarker for Counting Adult Tissue Stem Cells for the First Time 3Asymmetrex Reports Positive Indicators for Crowdsourcing Campaign to Evaluate New Biomarker for Counting Adult Tissue Stem Cells for the First Time 4
... You cannot commoditize talent when the key skills for ... have to pay for talent in order to compete ... organizations. , ,There is a misperception that there is ... country. The reality is that there are many qualified, ...
... Rick Davidson Milwaukee, Wis. - Rick ... the word global is in your title, and your company ... blanket - especially in jest. , ,Not that the good-humored ... Manpower , is prone to exaggeration. The Milwaukee-based employment services ...
... - Marshfield Clinic ... management software developed by TeraMedica , a ... as Evercore, will be deployed to integrate all ... images, then distribute them within the clinic's electronic ...
Cached Biology Technology:Getting beyond the vortex of corporate mediocrity 2Getting beyond the vortex of corporate mediocrity 3Getting beyond the vortex of corporate mediocrity 4CIO Leadership Series: Rick Davidson, Manpower 2CIO Leadership Series: Rick Davidson, Manpower 3CIO Leadership Series: Rick Davidson, Manpower 4CIO Leadership Series: Rick Davidson, Manpower 5
Mouse Anti-Human Killer cell immunoglobulin-like receptor, two domains, long cytoplasmic tail, 4 (KIR2DL4 Monoclonal Antibody Family: New...
Mouse monoclonal [7B9] to beta II Tubulin ( Abpromise for all tested applications). Antigen: Synthetic peptide, CEEEEGEDEA found at the c-terminus of beta II tubulin. Entrez GeneID: 10383 ...
Gridded Cell Culture Petri Dish (20 mm molded in base), tissue-culture treated...
...
Biology Products: