1. Selection and Isolation
Pg 17L

2. Species over time Animals evolve and can change
Sometimes the change is so great, they no longer can reproduce with each other

3. Why it happens If we are successful at something, we keep doing it.
Animals see this as a survival trait and want it to pass to their offspring
Think about battle of the beaks, who was more successful? Did you want to be using the tool?

4. Things happen
As populations evolve and begin to become a new species they slowly grow apart from original one
Eventually they become isolated

5. Behavioral isolation
Two species are compatible for mating but have different courtship rituals or behaviors

7. Geographical isolation
A population becomes separated by the geography
Over time they adapt to that habitat and can only mate with those of a similar habitat

8. Temporal Isolation
Species can only mate during a given time of the season.
T for time, two similar species mate at different times therefore they can mate only with own species

10. Traits for fitness
Sometimes the environment can change and select a more fit trait
Ex. Climate change, new species, extinction of another species

11. Directional Selection
When individuals with one of the traits has higher fitness
One of the traits = Good

12. Stabilizing Selection
When individuals with a blended trait (center of the curve) have a higher fitness
Center of curve
Blended trait = Good

13. Disruptive Selection When individuals at both ends have higher fitness
you need one trait or the other to be successful