The classical definition of microevolution is variation below the species level and macroevolution is defined as speciation. What is a species? well the best biological definition is that a species is a group of organisms that are chemically interfertile and produce fertile offspring. And this has been observed to occur, so we know that macroevolution happens. So what do creationists consider macroevolution?
Creationists, what is your definition of "Macroevolution"?
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