An ecologist is studying the effects that a population of predators is having on a population of prey.

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

An easy way to calculate the amount of energy available at each level is to what?

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin