Why was natural selection an important contribution to the theory of evolution?
It proved that evolution is true.
It explained how evolution works.
It summarized the process of evolution.
Olt highlighted the main points of evolution.

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.