Caption: Choanoflagellates, microbes with a lineage that dates back hundreds of millions of years, are providing evidence that some of the critical biological processes at work today in humans and other animals were at play before the advent of modern animals from a common unicellular ancestor. Research from UW-Madison genetics professor Sean Carroll and colleagues, published in the July 18, 2003 edition of the journal Science, provides striking evidence that key molecular communication processes, common to modern animals, are at least 600 million years old.
Photo by: courtesy of Stephen Paddock
Date: July 2003
High-resolution 300 DPI JPEG