Which of the following is evidence that dolphins evolved from four legged mammals not fish

Dolphins are mammals

Explanation: Research have made scientists believe that dolphins evolved from a hoofed mammal called Mesonyx and went back into the sea fifty million years ago.

Dolphins shows signs of hind protrusions but disappeared before birth. (theory)

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.