Biology 16 3 the process of speciation[1]
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Biology 16 3 the process of speciation[1]

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    Biology 16 3 the process of speciation[1] Biology 16 3 the process of speciation[1] Presentation 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.