AP Biology / Unit 7: Natural Selection
7.2 Natural Selection
Notes
Selection depends on the environment, which can change.
- Directional, stabilizing and disruptive selection.
- Sexual selection favors traits that attract mates.
Practice
Medium birth weights survive best. This is:
Extremes are selected against.
Both very small and very large beaks are favored. This is:
Two extremes win.
After a drought, finches with larger beaks became more common. This is:
The average shifts.
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