Glucagon works by:

a. binding to hormone response elements on dna and stimulating glycogenolysis and gluconeogenesis.
b. binding to hormone response elements on dna and stimulating glycogenesis.
c. activating second messengers and stimulating glycogenolysis and gluconeogenesis.
d. activating second messengers and stimulating glycogenesis.

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

Environmental impacts on evolution : mastery test

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim