1. Gradualism suggests that change is gradual with the accumulation of unique morphological adaptation. Punctuated Equilibrium suggests that rapid change occurs, with a new species “erupting” from the ancestral lineage and then staying the same thereafter.

3. Gradualism TThe evolution of new species by gradual accumulation of small genetic changes over long periods of time SSlow and steady change in an organism OOver a short period of time it is hard to notice

4. Gradualism Current living zebras (top), extinct quaggas (bottom)

5. Gradualism

6. Gradualism

7. Punctuated Equilibrium SStable periods of no change (genetic equilibrium) interrupted by rapid changes involving many different lines of descent RRare, rapid events of branching speciation

8.  Horseshoe crabs have changed little since their first appearance in the fossil record.  They are in a state of equilibrium

9. Punctuated Equilibrium

12. Gradualism vs Punctuated

13. Similar to gradualism Similar to punctuated evolution