In an ocean ecosystem, which is necessary to begin a food web?

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

Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?