Darwin made 4 key observations:

1) Living things tend to produce more offspring than survive

2) Population numbers in a species stay constant over time

3) Each species displays a wide variation in features

4) Some of these variations are passed on to offspring

Living things are in continuous competition with each other for food, space, mates

It is ‘Survival of the Fittest’

Natural Selection = Survival of organisms best suited to surviving and reproducing in their environment

See the next page for evidence of evolution