A good example could be seen on George Stephanopoulos' ABC News roundtable Sunday: George introduced the race hypothesis, then instantly led the rush to distance himself from the idea--closely followed by everyone on his roundtable but Claire Shipman.
However, another study by Moeller & Tiffin [13] on maize showed evidence supporting the purifying selection and arms-race hypothesis.
The arms-race hypothesis is not the only mechanism that has been proposed to explain the evolution of deep corolla tubes.
Alternatively, the arms-race hypothesis proposes that both the host and pathogen continually develop new resistance and virulence alleles, with rapid and successive fixation of these alleles resulting in a competitive co-evolution of host and pathogen [7].
However, some of the other results do match what the three-races hypothesis predicts.
Neither of these observations would be predicted by the three-races hypothesis.
What this shows is that it is not sufficient for some of the genetic data examined by students to match the prediction of the three-races hypothesis predicts.
The "Red Queen's race" hypothesis [ 1] describes the coevolution of hosts and pathogens in natural ecosystems.
Some of the results of this simple analysis clearly differ from what the African/European/Asian race hypothesis predicts.
In accordance to the arms-race hypothesis, XopAC appears to be a major avirulence factor for recognition in resistant plants such as the Arabidopsis Col-0 accession.
The RACE hypothesis has been called into question recently, favoring the tidal movement of fluid and/or foam in the airways as an explanation for the mechanical behavior of the injured lung during positive pressure ventilation [ 16].
