1831-1836 thomas malthus charles lyell
TRANSCRIPT
DARWIN’S BIG IDEA
THE VOYAGE OF THE BEAGLE 1831-1836
WHAT DARWIN SAW
DARWIN’S INFLUENCES Thomas Malthus
DARWIN’S INFLUENCES Charles Lyell
DARWIN’S INFLUENCES Farmers & Breeders – Artificial Selection
ARTIFICIAL SELECTION
ARTIFICIAL SELECTION
PUBLISHING HIS RESEARCH Alfred Russel Wallace “On the Origin of Species” - 1859
DARWIN’S BIG IDEA Natural Selection:
More organisms are born than can be supported by the environment.
Organisms compete for resources.Organisms have variation. Those with
variations that are well suited to the environment are more likely to survive and reproduce.
Small differences in each generation can add up to big differences over time.
TYPES OF NATURAL SELECTION Stabilizing Selection
TYPES OF NATURAL SELECTION Directional Selection
TYPES OF NATURAL SELECTION Disruptive Selection