1. Bellringer-5/14/15 What does it mean to be the “fittest” individual?
Which moth has the greatest chance for survival? Why?
Over time as natural selection occurs and the moths that survive go on to reproduce, what color will be most common in the population?

2. Speciation
HOW SPECIES CHANGE OVER TIME

3. Speciation
Speciation refers to the evolutionary process by which new biological species arise

4. Directional Selection
When one extreme phenotype has the best chance to survive
As a result, the frequency (number) of those with that phenotype shift over time
Woodpecker beaks

5. Evolution of the horse DIRECTIONAL selection
Using the diagram as evidence, how did the horse evolve over time?
Hypothesize why these changes could have happened.

6. Stabilizing Selection
When the intermediate phenotype has the best chance to survive
Heterozygote advantage
Birth weight

7. Disruptive Selection
When both extreme phenotypes have the best chance to survive
Peppered moth