Editing Substitution (section)

===Biology and chemistry===
*[[Base-pair substitution]] or point mutation, a type of mutation
*[[Substitution reaction]], where a functional group in a chemical compound is replaced by another group
**[[Substituent]], the atom or atoms that replaces those of the reactant
*Substitution, a process in which an allele arises and undergoes [[fixation (population genetics)|fixation]]