3. Reproductive Isolation Separation of species or populations so that they cannot interbreed and produce fertile offspring. These birds do not mate because their mating songs are different
4. Behavioral Isolation Form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding
5. Geographic Isolation Form of reproductive isolation in which populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water. Mountains
6. Temporal isolation Form of reproductive isolation in which two populations reproduce at different times.
7. Key concept As new species evolve, populations become reproductively isolated from each other.
8. Key Concept Speciation in the Galapagos finches occurred by founding of a new population, geographic isolation, changes in the new population’s gene pool, reproductive isolation, and ecological competition.
