Can energy be released during a chemical reaction? can it be absorbed?

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

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?