試題詳解

61. According to the concept of punctuated equilibrium, the "sudden" appearance of a new species in the fossil record means I that .
(A) The species is now extinct.
(B) The species will consequently have a relatively short existence, compared to other species.
(C) Speciation occurred over many thousands of years.
(D) Speciation occurred in one generation.
(E) Speciation occurred instantaneously.