What type of succession takes place when there is no existing biotic community or soil to begin with?
a. primary succession
b. secondary succesion
c. tertiary succession
d. none of these

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