Navigation Links
How the whale got its teeth
Date:2/19/2013

Whales are mammals, but they don't look like the mammals living around us, as they have a triangular fluke for tail, no hind legs and no body hair. And inside their mouths, their teeth are unfamiliar too being much simpler and 'peg like'. A multidisciplinary team of researchers have now married together the fossil record and the embryonic development process to investigate how the whale got its teeth.

Most mammals have four kinds of teeth, each shaped for specific tasks. In most mammals there are wedge-shaped incisors, a pointy canine, and premolars and molars with bumps and valleys that fit together like a mortar and pestle when you chew. Not all whales have teeth, but those that do, such as killer whales, have rows of simple peg like teeth, each one looking the same as the next. Whales use this spiked row of teeth to grab prey, but unlike other mammals, whales do not chew. In a new study published today in the open access journal PeerJ, Brooke Armfield and colleagues investigated the developmental processes that cause the teeth of dolphins, whales' smaller cousins, to be different, and tracked the evolutionary progression of their unique dentition across the fossil record.

Whales evolved from land mammals and so Armfield and co-workers first went to the fossil record to trace when and how whales evolved their simple teeth. The fossil record shows that, 48 million years ago, whales had the same four kinds of teeth just like most other mammals. Gradually, the teeth of whales became simpler and acquired their characteristic peg-like appearance around 30 million years ago, well after the time that they had acquired an array of adaptations for living in the water.

Next, Armfield and her colleagues explored just how teeth are shaped during development. Specific proteins in the embryo cause developing teeth to grow into certain shapes. Armfield and colleagues zeroed in on two pro
'/>"/>

Contact: Brooke Armfield
barmfield26@gmail.com
352-273-8101
PeerJ
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Genetic survey of endangered Antarctic blue whales shows surprising diversity
2. Giant squids giant eyes: The better to see hungry whales with
3. Ancient whale species sheds new light on its modern relatives
4. How to make high-end perfumes without whale barf
5. New iPad, iPhone app helps mariners avoid endangered right whales
6. Study amplifies understanding of hearing in baleen whales
7. Whale population size, dynamics determined based on ancient DNA
8. A whale of a discovery: New sensory organ found in rorqual whales
9. Scientists discover a new sensory organ in the chin of baleen whales
10. Killer whale at risk due to inadequate prey population
11. First paternity study of southern right whales finds local fathers most successful
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
How the whale got its teeth
(Date:4/22/2014)... Analyzing thousands of breeding bird surveys sent in ... Canada over 35 years, wildlife researchers report that most ... northward or toward higher elevation in response to climate ... means that most previous studies of potential climate change ... or the other have likely underestimated the effects of ...
(Date:4/22/2014)... effects of temperature and precipitation on the global distribution ... of climate research, the UV-B radiation, is often neglected. ... colleagues from the Universities in Olomouc (Czechia), Halle and ... space agency in such a way that they can ... on organisms. , The basic input data were provided ...
(Date:4/22/2014)... your age" is another way of asking him or ... bring improvements. Certain cells of the immune system tend ... to illness. Because these cells are known to misbehave ... microgravity on immune cells to better understand how our ... the National Institute on Aging, part of the National ...
Breaking Biology News(10 mins):Wildlife response to climate change is likely underestimated, experts warn 2UV-radiation data to help ecological research 2For an immune cell, microgravity mimics aging 2For an immune cell, microgravity mimics aging 3For an immune cell, microgravity mimics aging 4For an immune cell, microgravity mimics aging 5
... , WEST LAFAYETTE, Ind. - Scientists could take greater ... of advanced techniques used to understand the mechanisms that ... former Purdue University researchers say. In a perspective ... Purdue assistant professor of genetics, and Ivan Baxter, a ...
... could make more tomatoes taste like heirlooms, reports an international ... scientist. The finding, which will be reported in the ... significant implications for the U.S. tomato industry, which annually harvests ... and fresh-market sales. "This information about the gene responsible ...
... big boss proteins that switch on broad developmental ... regulators of muscle development or fat metabolism. One ... protein, takes charge following a cellular crisis known ... by the accumulation of misfolded and aggregated proteins. ...
Cached Biology News:Adoption of advanced techniques could propel crop improvement 2Discovery may lead to new tomato varieties with vintage flavor and quality 2Forty's a crowd 2Forty's a crowd 3Forty's a crowd 4
(Date:1/15/2014)... Pittsburgh, PA (PRWEB) January 15, 2014 The ... Company, publisher of Food Safety Tech , an e-Journal ... has signed an agreement for the second year for the ... with Pittcon 2014. The partnership provides that the registration fee ...
(Date:1/15/2014)... Westlake Village, Calif. (PRWEB) January 15, 2014 ... cancer treatment and management through the genomic analysis of ... will offer Therapy Finder™, a web-based cancer decision support ... a reporting option with Cynvenio’s ClearID™ genomic test, Therapy ...
(Date:1/15/2014)... 15, 2014 This webinar will focus ... clinical safety assessment in biosimilars. , Regulatory frameworks are ... drug development, however the complex nature of biopharmaceuticals makes ... and efficacy extremely challenging. Based on the specific aspects ...
(Date:1/15/2014)... Reston, VA (PRWEB) January 15, 2014 ... education have continued their sponsorship of an annual competition ... interest in, and access to, innovative STEM study. The ... , TEAMS: Tests of Engineering Aptitude, Mathematics, and ...
Breaking Biology Technology:Pittcon Announces Second Year Partnership With Food Safety Tech 2Pittcon Announces Second Year Partnership With Food Safety Tech 3Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5
... April 24, 2008 / b3c newswire / - ... are working on a project to synthesize a gene ... statistically expected and controlled ratio at preselected positions within ... core technology, Slonomics™, a unique DNA engineering platform using ...
... N.C. -- Duke University chemists have found a way ... thick in very large numbers, removing a major roadblock ... These single-walled carbon nanotubes also follow parallel paths as ... potentially impede electronic performance, said Duke associate chemistry professor ...
... Sangamo,BioSciences, Inc. (Nasdaq: SGMO ) today announced ... results on Wednesday, April 30,2008, after the market closes. ... at 2:00 p.m. PT, which will be open to ... the company will review,the financial results and discuss other ...
Cached Biology Technology:Sloning and the Kornberg group at Stanford University starting evaluation project regarding the synthesis of a Statistically Randomized Gene Library 2Nanotubes grown straight in large numbers 2Nanotubes grown straight in large numbers 3Sangamo BioSciences Announces First Quarter Conference Call and Webcast 2Sangamo BioSciences Announces First Quarter Conference Call and Webcast 3
Immunochemistry 1 & 2...
...
Hucal Agx Antigen Expression Service Specificity: Hucal Agx ...
MHC. Sections include: the isolation and functional properties of antigen-presenting cells analysis of MHC class II endocytosis and peptide turnover analysis of signalling via MHC class II molecu...
Biology Products: