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7 August, 03:27

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

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  1. 7 August, 03:35
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    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.
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