To be effective solvent in living systems, a substance must be able to meet all but one of the following requirements, namely
a. remains liquid over a wide temperature range
b. does not readily combine with lipid molecule
c. able to dissolve a great variety of chemical compounds
d. provide a safety against extremes in temperature by having a high heat capacity

Option B is correct. To be effective solvent in living systems, a substance must be able to meet all but one of the following requirements, namely - Does not readily combine with lipid molecule.                                                                        

b. heterotroph

explanation:

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.