What would be the calculated population density for a frog population if there were 100 frogs living in a pond that covers four square kilometers?

A) 100 frogs per square kilometer

B) 50 frogs per square kilometer

C) 40 frogs per square kilometer

D) 25 frogs per square kilometer

Which format should he use to present his data?

List two limitations of natural selection

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