Hvirveldyr: Forskelle mellem versioner

 

== Eksterne henvisninger ==

* [http://www.sciencedaily.com/releases/2004/05/040507080649.htm 2004-05-07, Sciencedaily: Surprising 'Ultra-conserved' Regions Discovered In Human Genome] Citat: "..."As far as we can tell, most of these ultra-conserved elements showed up during the evolution of vertebrates, perhaps during the period when land animals emerged, or a bit earlier. But their early evolutionary history is still mysterious," Haussler said..."

* [http://www.sciencedaily.com/releases/2004/05/040506071505.htm 2004-05-06, Sciencedaily: Scripps Scientists Look Deep Inside Sharks And Their High-performance Swimming System] Citat: "..."Sharks and bony fishes have been separated for over 400 million years and yet we see one group of sharks and one group of bony fish that share a remarkable host of similarities in body form and function," said Donley..."