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Why do organisms build tissues they seemingly never use?
Date:8/10/2012

tes those parts is inefficient."

An interesting consequence is that newly evolved traits tend to get added at the end of development, because there is less risk of disrupting anything important. That, in turn, means that there is a similarity between the order things evolve and the order they develop.

A new technology called computational evolution allowed the team to conduct experiments that would be impossible to reproduce in nature.

Rather than observe embryos grow, the team of computer scientists and biologists used BEACON's Avida software to perform experiments with evolution inside a computer. The Avidians self-replicating computer programs mutate, compete for resources and evolve, mimicking natural selection in real-life organisms. Using this software, Clune's team observed as Avidians evolved to perform logic tasks. They recorded the order that those tasks evolved in a variety of lineages, and then looked at the order those tasks developed in the final, evolved organism.

They were able to help settle an age-old debate that developmental order does resemble evolutionary order, at least in this computationally evolving system. Because in a computer thousands of generations can happen overnight, the team was able to repeat this experiment many times to document that this similarity repeatedly occurs.
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Contact: Layne Cameron
layne.cameron@cabs.msu.edu
517-353-8819
Michigan State University
Source:Eurekalert

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