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Convergent Evolution & Vestigial Structures. Convergent Evolution  (Comes from the word “converge”)  (“come together” or “meet”)  Produces unrelated.

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Presentation on theme: "Convergent Evolution & Vestigial Structures. Convergent Evolution  (Comes from the word “converge”)  (“come together” or “meet”)  Produces unrelated."— Presentation transcript:

1 Convergent Evolution & Vestigial Structures

2 Convergent Evolution  (Comes from the word “converge”)  (“come together” or “meet”)  Produces unrelated organisms that look similar to one another  The same environment will produce similar adaptations in different (unrelated) animals FishMammal Bird

3 Human Vestigial Structures  Vestigial structures – something that no longer does what it was evolved for  On humans:  Ear muscles  Wisdom teeth  Appendix  Tail bone  Goosebumps

4 (Vestigial Structures)  On animals:  Whales and snakes have leg bones  Flightless birds still have wings  Animals with non-functional eyes Reptile Vestigial Structures.aviFlightless Cormorants.avi

5 Vestigial Structures, Continued Dolphin Embryo Hind limb “buds” Polydactyl horse toes Evolution of Horses.avi

6 Vestigial Structures  The presence of a vestigial organ doesn’t greatly affect an organism’s ability to survive and reproduce  (Tiny legbones on snakes don’t help, but they don’t really hurt either)  (Evolving them out isn’t really a “priority”)SnakeHuman


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