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Evidence that supports evolution

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Presentation on theme: "Evidence that supports evolution"— Presentation transcript:

1 Evidence that supports evolution

2 Evidence 1: Biogeography
Some organisms tend to be SIMILAR but different in geographically separate areas Ex: zebra in Africa and horses in Mongolia This is due to having a COMMON ancestor but then “evolving” once they were isolated (Gondwanaland)

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5 Evidence 2: The Fossil Record

6 Caste

7 Moulds

8 Frozen relics Mammoth calf

9 Organisms preserved in amber

10 Organisms preserved in tar pits

11 Bone and teeth replaced with stone

12 How fossils form

13 Evidence 3: Comparative Anatomy
By looking at the structures found in different species of animal, we can see evidence of a COMMON ORIGIN… Ex: Wings of a bird and wings of a bat; bones in the hand of a human and bones in the flipper of a whale

14 Homologous (same) structures

15 Analogous (different) structures

16 Vestigial (not used) organs

17 Evidence 4: Comparative embryology

18 Evidence 5: Molecular Biology
Every living thing uses DNA Some amino acids are THE SAME between species We are just 2 amino acids difference to a gorilla!

19 Evidence 6: Domestication
We have SELECTED specific traits over generations to turn: A wolf into a poodle! A crabapple into a “granny smith” We select traits and breed plants and animals for specific purposes and “change” it over time


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