What should the student add to stage 3 to complete the model? A. Add chromosomes unraveling to small, thin strands.
B. Add chromosomes exchanging information for increased variety.
C. Add chromosomes pairs being pulled toward opposite poles of the cell.
D. Add a plate in the midline of the cell to show two new cells forming.

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

How do chloroplasts set plants apart from other living things

Name the part of the the brain labeled "e".