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CONFIDENCE IN THE FACT OF EVOLUTION
RESTS UPON THREE GREAT CLASSES OF INFORMATION – ACCORDING TO
GOULD
SMALL SCALE/ SHORT TERM CHANGES
• CHANGES WE CAN SEE DURING A LIFETIME• DIRECTLY OBSERVABLE
PESTICIDE RESISTANCE
PEPPERED MOTH
BACTERIA RESISTANCE TO ANTIBIOTICS
• EX MERSA• METHACILLIN• RESISTANT• STAPHYLOCOCCUS• AUREUS
ARTIFICIAL SELECTION
TOLERANCE IN PLANTS AND ANIMALS
DANDELION HEIGHT
LARGE SCALE/LONG TERM CHANGES
• CHANGES THAT TAKE PLACE OVER TENS OF THOUSANDS, HUNDREDS OF THOUSANDS, MILLIONS, TENS OF MILLIONS, HUNDREDS OF MILLIONS, AND BILLIONS OF YEARS
• WE CANNOT POSSIBLE OBSERVE THESE CHANGES, BUT WE CAN INFER THEM FROM THE EVIDENCE
FISH TO AMPHIBIAN
REPTILE TO MAMMAL
REPTILE TO BIRD
WHALE EVOLUTION
SIGNS OF HISTORY PRESERVED IN LIVING THINGS AND ECOSYSTEMS
HUMAN VESTIGIAL STRUCTURES
• TAILBONE• APPENDIX• EAR WIGGLE• NICTITATING MEMBRANE• WEBBING IN FINGERS AND TOES• WISDOM TEETH• ……….
VESTIGIAL STRUCTURES IN WHALES
• Hind limbs• Finger muscles• Diaphragm• Ear canal that leads to no external ear• ….
VESTIGES IN SNAKES
• HIPS, LEGS IN PYTHONS, BOAS
EVIDENCE OF HISTORY IN ECOSYSTEMS
• COAL IN ANTARCTICA• SEA FOSSILS IN DESERT REGIONS• SEA FOSSILS ON MOUNTAIN TOPS• LAND FOSSILS ON SEA FLOOR• …..• DUE TO CONTINENTAL DRIFT