How does a mutation affect a gene? a. a mutation changes the sequence of dna bases in a gene. b. a mutation creates the sequence of traits in a gene. c. a mutation creates the sequence of rna bases in a gene. d. a mutation changes the sequence of rna bases in a gene.

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.