The Punctuated Equilibrium Model of Evolution Suggests That New Species

Multiple Choice

The punctuated equilibrium model of evolution suggests that new species appear

A) gradually; as groups become isolated, they slowly evolve through their own individual pathway.
B) only after older species disappear from the fossil record.
C) suddenly after long periods of time with little to no change.
D) gradually after long periods of time with little to no change; as groups become isolated, they slowly evolve through their own individual pathway.
E) gradually, but over very short periods of time, so that intermediate species are often observed in the fossil record.