Darwin’s Theory of Natural Selection

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Presentation transcript:

Darwin’s Theory of Natural Selection SURVIVAL OF THE FITTEST!!!

How does Evolution by Natural Selection occur? Overproduction Competition Variations Survival of the Fittest Reproduction Speciation One Can Very Secretly Run South

1) Overproduction More organisms are produced (born) than can survive in the environment. Limited Resources

2) Competition for Resources Organisms fight/compete for the limited resources. Space Food Water Mates

3) Variation Differences exist among members of the population that make them more fit to survive than others Longer Necks Stronger Color that blends in High Adaptive Value = Good Low Adaptive Value = Bad

4) Survival of the Fittest Individuals with the best traits (adaptations) will survive. Organisms without good adaptations will die out.

5) Reproduction Only individuals that survive will be able to reproduce. When “fit” individuals reproduce, they will pass on their positive adaptations.

6) Speciation Over time, after many generations of natural selection, new species with different variations of similar traits may form. The Making of the Fittest: Natural Selection and Adaptation