Transcript chapter 7 the evolution of living things

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.
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