According to evolutionary embryological evidence, most animals in the animalia kingdom has gill- like slits in embryo, the splits represent ?

the answer is d (apex) good luck : ))

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.  

"a.) well–developed vascular system."

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.