Navigation Links
Evolution reveals an independent route for diversity in animal form

Researchers have found that Cnidaria, a group of marine animals noted for diverse morphology among its constituent species, actually lacks the ancient "Hox" gene system that is essential for the development of most other animals

. The finding is surprising because the Hox system is largely responsible for so-called axial patterning, the developmental process that directs the formation of different morphological features along the anterior-posterior axis--the axis along which the head, trunk, and tail are arranged. The work indicates that despite the importance of the Hox system in the development of most animals, the evolution of a typical Hox system is not in fact a prerequisite for axial patterning during development or for the generation of diverse animal morphology.

The findings are reported in the May 9th issue of Current Biology by scientists Bernd Schierwater, Kai Kamm, and Wolfgang Jakob of Tierärztliche Hochschule Hannover, in Germany, Stephen Dellaporta of Yale University, and David Miller of James Cook University in Australia.

A remarkable feature of Hox-system genes is that they are typically clustered in groups along chromosomes, with their order along the chromosome reflecting their actual pattern of expression along the anterior-posterior axis of a developing animal. The Hox system has long been considered a defining characteristic of animals, and much of the variation seen in animal morphology has been attributed to evolutionary variations on how the Hox system is implemented during development in different species.

In the new work, the researchers investigated the Hox status of cnidarians--a group of primitive animals that diverged very early on in animal evolution from the lineage leading to most other animal species. Cnidarians include reef-building polyps and pelagic jellyfish, while the group from which it split--the Bilateria--has given rise to the vast majority of the animals we are familiar with, including wor
'"/>

Source:Cell Press


Page: 1 2

Related biology news :

1. To Stop Evolution: New Way Of Fighting Antibiotic Resistance Demonstrated By Scripps Scientists
2. Evolution of taste receptor may have shaped human sensitivity to toxic compounds
3. Evolution of life on Earth may hold key to finding life in outer space
4. Evolutionary conservation of a mechanism of longevity from worms to mammals
5. Evolutionary biology research techniques predict cancer
6. Evolutionary shifts in olfactory sensitivities in fruit flies
7. Evolution follows few of the possible paths to antibiotic resistance
8. Evolution mystery: Spider venom and bacteria share same toxin
9. Evolution of irreducible complexity explained
10. Evolutionary scrap-heap challenge: Antifreeze fish make sense out of junk DNA
11. Evolutionary forces explain why women live longer than men
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Evolution reveals independent route for diversity animal form

(Date:7/11/2014)... 2014---A team of researchers from The Chinese University of ... gene of wild soybean linked to salt tolerance, with ... saline soil. This study published online in Nature ... genomic information for crop improvement. , Soybean is an ... human selection, cultivated soybeans have less genetic diversities than ...
(Date:7/11/2014)... animals often develop relationships with other group members to ... wild chacma baboons the strategy for grooming activities shows ... just published in the scientific journal Biology Letters ... baboons is not practiced without ulterior motives. To be ... the individual, while grooming another individual can provide access ...
(Date:7/11/2014)... two different ways that allow unprecedented experimental insights ... of oxygen molecules in photosynthesis. The two studies ... Nature Communications . , "The new knowledge will ... oxidation, which are key components for building artificial ... energy in fuels like hydrogen, ethanol or methanol," ...
Breaking Biology News(10 mins):BGI reports a novel gene for salt tolerance found in wild soybean 2Baboons groom early in the day to get benefits later 2Molecular snapshots of oxygen formation in photosynthesis 2
... at the Stanford University School of Medicine have taken ... cells that could eventually be transplanted into living organisms. ... surgical resident Oscar Abilez, MD, and colleagues have successfully ... building blocks of blood vessels, after placing them in ...
... over a decade, the technique of distraction has been ... to reduce pain associated with certain medical procedures. The ... there is an important psychological element in the perception ... the harmful stimulus affecting the perception of the pain. ...
... of York have made a huge leap forward in the ... the Department of Biology has made a significant advance in ... biological warfare. , Bacteria like E. coli frequently try to ... called colicins, which are potent toxins. , The research ...
Cached Biology News:Stanford doctors advance in bid to turn mice stem cells into blood vessels 2Stanford doctors advance in bid to turn mice stem cells into blood vessels 3Virtual realities against pain 2
(Date:7/10/2014)... Deep Knowledge Ventures last week ... ‘Commercialising Longevity Research’ and welcomed a host of ... Bioscience Innovation Center for the event, organised by ... Ltd. The meeting highlighted the need for both ... age-related disease, as well as the crucial role ...
(Date:7/10/2014)... (PRWEB) July 10, 2014 Unraveling life’s ... together. The Archer Family purchased a DNA ... DNA, but ended up with a lifetime of memories, ... within the family members’ DNA genuinely brought the family ... to search deeper into genetic history and prior to ...
(Date:7/10/2014)... EvoDerma ’s NOOME Anti-Aging Motion has been upgraded for ... a second treatment cup to help prevent and smooth skin ... thinner on the edges for a softer contact with the ... surfaces on the face, neck and décolleté. Choose to use ... such as the cheeks and neck, or opt for the ...
(Date:7/10/2014)... July 10, 2014 On July ... Medvedev , presented Russia,s first ... . The Company is developing a unique project called ... BIOCAD develops a number of innovative drugs based on ... The ceremony took place at the International Exhibition "Innoprom ...
Breaking Biology Technology:DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2Dmitry Medvedev Presented BIOCAD the First National "Industry" Award 2
... , , ... issue of the journal,Diabetic Hypoglycemia ( http://www.hypodiab.com ) reviews ... Professor Vincent Marks , a leading ... criminal behavior, discusses how,hypoglycemia-related neuroglycopenia can cause behavioral changes, which ...
... ... the company as a regulatory consultant after retiring from Eli Lilly & Co. ... science and human pharmaceutical products, including director of regulatory affairs and clinical research. ... US regulatory submissions. , ...
... ... ... 2010 -- Agriculture is a game-changer that addresses multiple global issues – hunger, poverty, ... CEO Ellen Kullman told attendees of the 40th World Economic Forum Annual ...
Cached Biology Technology:Hypoglycemia - A Role in Criminal Behavior and a Consideration for Custodial Care 2Hypoglycemia - A Role in Criminal Behavior and a Consideration for Custodial Care 3Michael Langley, DVM, MBA, RAC Joins the Anson Group as a Regulatory Consultant 2DuPont Chair and CEO: Agriculture is Key to Global Economic Growth, Sustainability and Security 2