Evidence that supports evolution

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)

Evidence 2: The Fossil Record

Caste

Moulds

Frozen relics Mammoth calf

Organisms preserved in amber

Organisms preserved in tar pits

Bone and teeth replaced with stone

How fossils form

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

Homologous (same) structures

Analogous (different) structures

Vestigial (not used) organs

Evidence 4: Comparative embryology

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!

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