Ecological succession that occurs in an area where no ecosystem existed before (such as bare rock with no soil) is called: a. primary succession b. secondary succession c. ecological succession d. keystone succession

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs