How is the sickle-cell allele maintained through natural selection? a.) individuals with two recessive alleles have very high rates of reproduction. b.) mosquitoes that pass along the parasite also pass on the recessive allele. c.) individuals with two dominant alleles have very low rates of reproduction. d.) heterozygous individuals pass the dominant and recessive alleles to offspring.

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.