Theories+For+Tempo+Of+Speciation

There are two models for the tempo of speciation.

1. Gradualism model This model shows that species descended from a common ancestor gradually diverge more and more in their morphology as they become accustom to their unique adaptations.



2. Punctuated equilibrium model This model shows that a new species changes most as it buds from a parent species and then changes little for the rest of its existence. The change usually happens because of something drastic.



AP Biology Book 7th Edition