Explain how the turtle’s evolutionary process evolved the function of turtles shells?

The explanation for the turtle's evolutionary process was quite a challenging one for evolutionists.

Two categories of paradigms have come to offer their ideas about how they think the turtle came about its amour.

Palaeontologists (that is, those who examine and report on the history of life here on earth using fossil records) state that the turtle's shell developed into what it is now over time from bony scales same as those which can be found on armadilloes and crocodiles.

Development biologists have a  very different opinion. They theorize that the shell evolved out of ribs. The ribs, according to them due to the need for environmental adaptation, became wider, and flatter and eventually merged to form shells.

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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.