Histones are the proteins helping to package DNA molecules. Most of them are involved in nucleosome level of DNA compactization, but there are two of them involved in higher DNA compactization levels. What are they called? Their functions?

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.  

the fossil record provides evidence of a common ancestor to many species.