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		The effects of ethanol on beak length Since beak tissue is derived from NCC (Gilbert, 1997), we expected a decrease in beak length. The regression of beak length reveals a trend toward decreasing length with increasing ethanol concentration (Figure 3), but these values are not significant (Table 1). Perhaps the injected amount of ethanol was not significant enough to elicit the anticipated response in the developing chick embryos. Further research could explore the possibility of attaining the potential critical concentration.