I believe it was <span>Francisco de Xeres but I might be wrong..</span>
<span>No, this does mean that the aversion trait evolves in the cockroach populations exposed to the bait. Cockroaches are a diverse species. This diversity is one of the reasons they thrive. Not all cockroaches will be strongly attracted to hydramethylnon-corn syrup. However, the ones that are all died and can not procreate. The cockroaches that are not very attracted to the syrup live on to breed, and pass along the aversion trait. So the trait does not necessarily evolve, but it does become more prevalent.</span>
<span>the blacklisting of suspected communists
Those suspected of communism were removed from their jobs and often investigated by the government.
Blacklisting prevented people from getting homes, jobs, and were investigated and watched by the government. McCarthyism created fear and people turning in neighbors and acquaintances for any odd behavior. </span><span />