Active transport involves moving molecules from _ a
high concentration to low concentration
b
low concentration to high concentration
c
high concentration to high concentration

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

Classify the structures as homologous or analogous, depending on their structure and function.

According to the cladogram, which organisms have roundworms as a common ancestor?