Need help please and thanks

What are the two main phases of a cell cycle

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only