This organelle is the “frame” of the cell. it gives the support & shape of the cell

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

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

What are the student's observations and inferences before he starts his investigation?