In the punctuated equalibrium model of evolution, periods of evolution are:
A) Short, with rapid change
B) long with rapid change
C) long with gradual change
D) Short with gradual change

A

Explanation:

Punctuated Equilibrium is when there is short periods of rapid speciation over long periods of time.  The actual periods of evolution is short.

Hope this helps!

answer; ///i believe that the correct answer is (a) specialized cells)