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The Oxford evolutionist and zoologist Mark Ridley describes the evolutionary school of thought of phyletic gradualism in the following manner:
|“|| Phyletic gradualism is a hypothesis about the pattern of evolution. In contrast to the theory of punctuated equilibrium, it states the following:
• Evolution has a fairly constant rate.
• New species arise by the gradual transformation of ancestral species.
• The rate of evolution during the origin of new species is much like that at any other time.
The evolutionary school of thought of phyletic gradualism is not supported by the fossil record.