Which feature below differentiates endocrine glands from exocrine glands? a. the location of the gland b. what the gland secretes its hormone into c. what organ or tissue is controlled by the gland's hormone d. the effects that the gland's hormone has on the body

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

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which of the following is a common response to cell signaling?