Biology 2nd Edition by Robert Brooker, Eric Widmaier ,Linda Graham ,Peter Stiling

تمرين 11

The concept of punctuated equilibrium suggests that
A) the rate of evolution is constant, with short time periods of no evolutionary change.
B) evolution occurs gradually over time.
C) small genetic changes accumulate over time to allow for phenotypic change and speciation.
D) long periods of little evolutionary change are interrupted by short periods of major evolutionary change.
E) both b and c.