Gradualism
Definition
Gradualism is a theory in biology that suggests evolution occurs slowly and steadily over a long period of time, with small genetic changes accumulating to bring about large changes.
Analogy
Think of gradualism like filling up a swimming pool with a slow trickle of water. It might not seem like much is happening at first, but given enough time, the pool will eventually be full.
Related terms
Microevolution: This refers to small evolutionary changes that occur over short periods of time, often within a single population or species.
Speciation: This is the process by which new and distinct species evolve from existing ones.
Phyletic Gradualism: This is a model of evolution which theorizes that most speciation is slow, uniform and gradual.
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