Darwin’s Theory of Evolution by Natural Selection Living things overproduce
Darwin’s Theory of Evolution by Natural Selection There is variation among offspring
Darwin’s Theory of Evolution by Natural Selection There is a struggle to survive
Darwin’s Theory of Evolution by Natural Selection Those that survive are most fit
Natural Selection: “Survival of the Fittest” Fitness = ability to survive and reproduce Fitness is the result of adaptations – inherited characteristics that increase an organism’s chance of survival
Descent with Modification Over time, natural selection produces organisms with different structures Today’s species look different from their ancestors Each species descended with changes over time
Descent with Modification Implies that all living things are related to one another COMMON ANCESTOR