Astimulus-response functional relation consisting of an antecedent stimulus that elicits a(n) response which is a product of the phylogenetic evolution of the species.

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the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.