Does evolution ever go backward? | Live Science
In regressive evolution, organisms lose complex features and can appear to evolve "in reverse." But evolution doesn't retrace its steps, experts said.| Live Science
In regressive evolution, organisms lose complex features and can appear to evolve "in reverse." But evolution doesn't retrace its steps, experts said.| Live Science
Something unique does seem to have taken place during this time when so many animal groups first appeared, but it's not an open-and-shut case.| Live Science
The extra legs caterpillars have appear have origins in the primitive crustaceans that insects evolved from during the Ordovician period over 400 million years ago.| Live Science
Crabby bodies are so evolutionarily favorable, they've evolved at least five different times. So why does this process, known as carcinization, keep happening?| Live Science
The Cambrian Explosion was a dramatic burst of evolutionary changes in life on Earth. During the Cambrian Period, which began about 540 million years, trilobites were the dominant species.| Live Science
I graduated from Sorbonne University (France) in Molecular and Cellular Biology, and I started my PhD at the Villefranche-sur-Mer marine station, where my research focused on the develoment and evolution of the nervous system in sea urchins, and on the roles of intercellular signaling pathways in this process. As part of my PhD, I spent one year at the Shimoda Marine Research Center (Japan). I am now trying to understand how morphological diversity emerged from gene regulatory networks, using...| Hopkins Marine Station
My research program while at the University was devoted to neuroanatomical studies of marine invertebrate larvae using serial EM reconstruction as a principal method. A number of phyla were examined and much of the data, in the form of negatives and selected photos, is lodged in the University Archives [see http://scaa.usask.ca/gallery/lacalli]. My particular focus, beginning in 1992, was a reconstruction of the anterior, brain-like region of the nerve cord of the invertebrate chordate Branch...| artsandscience.usask.ca
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