Both eye and liver cells contain the same genetic information. Expression patterns of 2 genes, the crystallin gene and the albumin gene, were observed in each type of cell. In liver cells, the albumin was expressed, and the crystallin gene was not. Conversely, in eye cells, the crystallin gene was expressed, and the albumin gene was not. Analysis of an upstream enhancer region for the albumin gene revealed DNA binding sites for activators A, B, and C, whereas, analysis of an upstream enhancer region for the crystallin gene revealed DNA binding sites for activators D and E. What is the best explanation for why the albumin gene is not expressed in eye cells?

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.  

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