Use the following questions to develop ideas for your proposal. what do you think is the most significant problem regarding the sale of organs? why do you think it is a problem? who has the power to solve this problem? why has it not been solved up to this point? how can the problem be solved? what are the benefits and costs related to your solution?

Which of the following is not a characteristic of carnosaurs? a. long narrow skulls b. strong forelimbs c. horn projecting from their skulls d. none of the above

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

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.