Navigation Links
And the first animal on Earth was a...
Date:4/10/2008

o its own evolutionary path; or 2) the sponge evolved its simple form from more complex creatures--a possibility that underscores the fact that "evolution is not necessarily just a march towards increased complexity," says Dunn. "This scenario would provide a particularly dramatic example of that principle."

How Old is Old?

How long ago did the earliest comb jelly diverge" "Unfortunately, we don't have fossils of the oldest comb jelly," laments Dunn. "Therefore, there is no way to date the earliest jelly and determine when it diverged."

After diverging from other species, the comb jelly probably continued to evolve, says Herendeen. Therefore, today's comb jelly--a common creature--probably looks very different that did the earliest comb jelly.

Moreover, the tentacled, squishy but bell-less comb jelly developed along a different evolutionary path than did the classically bell-shaped jellyfish, says Patrick Herendeen, an NSF program director. Such divergences mean that "the jellyfish type of body form has independently evolved several times," says Herendeen.

Remaining Gaps in the Tree of Life

While reversing the evolutionary order of the sponge and comb jelly, Dunn's study also resolved some long-standing questions about other species. Among these was whether millipedes and centipedes are more closely related to spiders than to insects. The answer: spiders.

But despite these and other important evolutionary insights provided by Dunn's team, the tree of life remains a work in progress. "Scientists currently estimate that there are a total of about 10 million species of organisms on earth," says Dunn. "But so far, only about 1.8 million species--most of which are animals--have been described by science. Very few of these species have, so far, been positioned in the tree of life."

A Methodological Breakthrough

But at least some of the tree of life's remaining gaps will
'/>"/>

Contact: Lily Whiteman
lwhitema@nsf.gov
703-292-8310
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Geneticist Francis Collins named first recipient of Inamori Ethics Prize at Case Western Reserve
2. First diagnostic test for Alzheimers and Parkinsons disease on the horizon
3. Childrens Hospital leads projects to develop nations first heart assist devices for young children
4. First rule of evolution suggests that life is destined to become more complex
5. Scientists launch first comprehensive database of human oral microbiome
6. The beetles genome sequenced for the first time
7. Fujitsu Combines Capacity, Performance and Power Efficiency Into the Industrys First 320GB 7200 RPM 2.5" Sata Hard Disk Drive
8. FCO and GSSC Team to Create Worlds First Self-Authenticating Passport
9. First study hints at insights to come from genes unique to humans
10. Unmanned aerial vehicles mark robotic first for British Antarctic Survey
11. Surprising discovery from first large-scale analysis of biodiversity and biogeography of viruses
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
And the first animal on Earth was a...
(Date:9/16/2014)... Scotland votes for independence later this week, its Government ... people that fracking is necessary, research has revealed. , ... tracking public perception of shale gas extraction in the ... living north of the border are the least supportive ... research in the University,s School of Geography, said: "The ...
(Date:9/16/2014)... From the salmon-rich waters of Southeast Alaska to ... Downeast Maine,s lobster, lumber and tourist towns, coastal residents ... about coastal environments divide along political lines. That,s a ... New Hampshire sociologists published this month in the journal ... a lot of environment-related differences from place to place ...
(Date:9/16/2014)... years ago, the Exxon Valdez spilled 11 million gallons ... themselves cleaning up another giant oil spill in the ... study in the Journal of Consumer Research , ... immediate anxieties instead of catalyzing changes in the way ... national news media coverage of these two events helped ...
Breaking Biology News(10 mins):Scottish people most sceptical on fracking, survey shows 2Scottish people most sceptical on fracking, survey shows 3Politics divide coastal residents' views of environment, UNH research finds 2Politics divide coastal residents' views of environment, UNH research finds 3Exxon Valdez 2014: Does media coverage of manmade disasters contribute to consumer complacency? 2
... summer for sports, fans. World records tumbled at the ... 200m world records, knocking tenths of a second off ... the last few decades, which made marathon runner Mark ... increase in population could account for these dramatic improvements. ...
... genetic polymorphisms induce major differentiations in the metabolic ... paper published November 28 in the open-access journal ... of researchers, led by Karsten Suhre, has conducted ... variants in genes involved in the breakdown of ...
... A new and insidious environmental threat has been ... Queen,s and York universities. Along with scientists ... documented biological damage caused by declining levels of ... the phenomenon "aquatic osteoporosis," Queen,s PhD candidate Adam ...
Cached Biology News:100-meter sprint world record could go as low as 9.48 seconds 2Study identifies genetic variants giving rise to differences in metabolism 2Queen's University biologists find new environmental threat in North American lakes 2
(Date:9/16/2014)... BCC Research reveals in its ... , the global market for stem cells is expected ... a five-year compound annual growth rate (CAGR) of 13.6%. ... with growth projections of $2.2 billion in 2014 to ... , Unlike other potential applications of bioscience, ...
(Date:9/15/2014)... , Sept. 15, 2014   Global ... innovator of scientific products and services for satellite ... Acquisition Solution for Integrated Services (OASIS) from the ... GST was selected to provide the government best-value ... Small Business (SB) category in Pool 4. The ...
(Date:9/15/2014)... University have developed a technique for controlling the surface ... opening the door to a new generation of reconfigurable ... on the fact that the oxide "skin" of the ... acts as a surfactant, lowering the surface tension between ... used a liquid metal alloy of gallium and indium. ...
(Date:9/15/2014)... September 15, 2014 Bioptigen ... imaging OCT system for the optical device metrology and ... EnvisuTM S4410 SDOCT for Contact Lens Metrology is ... and high complexity contact lens, IOL structures, and donor ... a complete contact lens immersed in a hydration bath ...
Breaking Biology Technology:Global Market for Stem Cells to Reach $10.6 Billion in 2018; The Americas Growing at 13.9% CAGR 2Global Market for Stem Cells to Reach $10.6 Billion in 2018; The Americas Growing at 13.9% CAGR 3Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 2Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 3Researchers control surface tension to manipulate liquid metals 2Bioptigen Introduces Deep Imaging OCT System for Contact Lens Metrology 2
... Inc. (Nasdaq: ECTE ), a company developing ... continuous glucose monitoring (tCGM) system and the Prelude® SkinPrep ... from its clinical study of its Symphony tCGM System ... Data from the study confirm that Symphony successfully monitors ...
... create electrical components like resistors, transistors and diodes, that ... Nongjian (NJ) Tao, a researcher at the Biodesign Institute ... molecules may also allow clever designers to produce novel ... conventional electronics. In research appearing in today,s ...
... YORK, Dec. 5, 2011 Levi & Korsinsky is ... securities of Pacific Biosciences of California, Inc. ("PacBio" or ... violations of federal securities laws. For more ... The investigation stems from allegations that the Company failed ...
Cached Biology Technology:Echo Therapeutics Announces Positive Results of Clinical Trial of its Symphony® Transdermal Continuous Glucose Monitoring (tCGM) System in Patients With Type 1 and Type 2 Diabetes 2Echo Therapeutics Announces Positive Results of Clinical Trial of its Symphony® Transdermal Continuous Glucose Monitoring (tCGM) System in Patients With Type 1 and Type 2 Diabetes 3Echo Therapeutics Announces Positive Results of Clinical Trial of its Symphony® Transdermal Continuous Glucose Monitoring (tCGM) System in Patients With Type 1 and Type 2 Diabetes 4S-t-r-e-t-c-h-i-n-g electrical conductance to the limit 2S-t-r-e-t-c-h-i-n-g electrical conductance to the limit 3The Law Firm of Levi & Korsinsky, LLP Launches an Investigation Into Possible Securities Laws Violations by Pacific Biosciences of California, Inc. 2
HOXC11 Antibody...
Anti-MMP-14, catalytic domain, clone LEM-2/15.8 Immunogen: Synthetic peptide: amino acid sequence 218-233 within the catalytic domain Available Date: 38579...
Rabbit anti MMP-13, Hinge Region MMP-13 Hinge Region...
Evolutionarily conserved signaling intermediate in Toll pathway...
Biology Products: