Which elements make up 97% of the universe?

question 3 options:

hydrogen and oxygen

hydrogen and helium

helium and oxygen

oxygen and iron

Which is required for sexual fissiondiploid cell productionmeiosis

Four types of motile cells in human body?

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