Before generating a hypothesis you would make observations

Wich organism obtains its energy from dead or decaying matter

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

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?