Which of the following statements describes a scientific law?
a. a scientific law explains a set of events.
b. a scientific law describes what occurs every time in a situation.
c. a scientific law is constantly modified.
d. a scientific law is developed without experimentation.

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

What did hunter gathers do to alter the environment?

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin