Biology 16 3 the process of speciationPresentation Transcript
16-3 The Process of Speciation
Speciation Formation of new species
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
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
Geographic Isolation Form of reproductive isolation in which populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water. Mountains
Temporal isolation Form of reproductive isolation in which two populations reproduce at different times.
Key concept As new species evolve, populations become reproductively isolated from each other.
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.