Evidence for Evolutio3 - Evidence for Evolution Corn...

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Evidence for Evolution Corn, caterpillars and wasps Well, I haven't heard any creationists on this board claim recently that there is no evidence for evolution, but I'll keep this series going since all the mail I've got concerning it has been favorable. I'll summarize here a paper from the most recent issue of Science. In this paper, Turlings, et. al. investigate the interactions of corn plants, caterpillars and parasitic wasps. The wasps parasitize the caterpillars that, in turn, eat corn. The authors found that corn, when eaten by caterpillars, releases chemicals (terpenoid volatiles) that attracts wasps. To determine what stimulus caused the release of these chemicals Turlings tested the following leaf types with respect to their ability to attract wasps: 1) leaves that caterpillars had eaten 2) leaves that were mechanically damaged (cut w/ razor blade) 3) leaves with caterpillar saliva on them. Note that the first type of leaf would have both mechanical damage and caterpillar saliva on it. It had been previously established that wasps were attracted by terpenoids.
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