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Transcript
CHAPTER 7 THE EVOLUTION OF LIVING THINGS SECTION 2 HOW DOES EVOLUTION HAPPEN? GROUND FINCH A HEAVY AND STRONG BEAK FOR SEED CACTUS FINCH PLIER LIKE BEAK FOR CACTUS OR NECTAR WARBLER FINCH HAS SMALL POINTED BEAK FOR PROBING CRACKS IN ROCK FOR INSECTS CORMORANTS THAT CAN’T FLY MARINE LIZARD OF GALAPAGOS DON’T WORRY! HE’S AN HERBIVORE I’M FROM ECUADOR EXAMPLES OF TORTOISE SHELLS GIANT TORTOISE TREAT ME WITH TENDER LOVING CARE THERE AREN’T MANY OF ME LEFT! DARWIN USES HIS OBSERVATIONS AND OTHER SOURCES TO WRITE AND PUBLISH THE ORIGIN OF SPECIES BY NATURAL SELECTION CHARLES DARWIN USED HIS PARENTS CHARLES LYELL THE GEOLOGIST Thomas Malthus ANIMAL AND PLANT BREEDERS MORE EVIDENCE OF NATURAL SELECTION • Darwin based his theory of evolution by natural selection on his parents. • He noticed that his parents passed on traits to his siblings. • Darwin was not aware of Mendel’s work. Darwin stated, “ Organisms have different variations that help them survive. • 1930’s-1940’s Scientists applied Mendel’s work to Darwin’s theory of evolution. • http://player.discoveryeducation.com/index .cfm?guidAssetId=FEB9F980-0463-4960B7FA0F1CAA56BF08&blnFromSearch=1&prod uctcode=DSC