What is an underlying notion that supports the 12-step program of alcoholics anonymous?
a. scientific evidence of cognitive changes accompanying abstinence
b. psychological theories of defense mechanisms
c. biological evidence of changes accompanying abstinence
d. spiritual ideas about recovery?

Which incident would result in primary succession instead of secondary succession?

When should a bar graph be used? a. when there is no independent variable. b. when the independent variable is continuous and does not show a relationship to the dependent variable. c. when the independent variable is continuous and shows a causal link to the dependent variable. d. when the independent variable is composed of categories and does not show a relationship.

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems