Gould's theory is an alternative to the idea that evolution is..
Fast and unpredictable
Instantaneous
Non-existent
Smooth and continuous
Answer
Evolution is not always smooth and continuous, as proposed by Gould's theory. This theory suggests that evolution occurs in fits and starts, with periods of rapid change interspersed with periods of relative stability. These periods of rapid change are known as punctuated equilibria, and they are thought to be driven by environmental changes or other external factors.
The Marvels of Stephen Jay Gould: A Quiz on the Life and Work of the Brilliant American Biologist and Historian of Science