Which of these scenarios could be a direct cause of a disease becoming a pandemic? 1- Patient sneezing on a doctor

2- Sick family returning from a foreign country

3- Mosquito in a field next to houses

4- Sick child attending school

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 does natural selection change thephenotypes within a population over time?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.