Question

Which of these describes punctuated equilibrium?

A. Rapid periods of speciation over a long time
B. Long periods of no speciation interspersed with short bursts of speciation
C. Gradual changes over a short period of time
D. Periods of medium speciation followed by periods of rapid speciation

Answer 1

b. long periods of no speciation interspersed with short bursts of speciation

Answer 2

Punctuated equilibrium is the theory that evolution occurs in sudden jumps, after which newly differentiated species exist in a state of stasis until the next jump. This is contrasted with theories which hold that evolution and speciation take place through a process of gradual adapatation. Thus, the correct answer is B, long periods of no speciation intersperced with short bursts of speciation.