Mr. Altorfer Science How Does Evolution Happen? Pages 174 to179.

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Presentation transcript:

Mr. Altorfer Science How Does Evolution Happen? Pages 174 to179

Objectives  Describe the four parts to Charles Darwin’s theory of evolution by natural selection.  Relate genetics to evolution.

My Hero  Charles Darwin- –Darwin signs on as a “naturalist” aboard the Beagle. –He travels all over the world to study the natural world. –The Galapagos Islands (Ecuador) provide the young Darwin with many interesting observations.

Charles Darwin

Darwin’s Finches  Darwin observed several species of finches on the Galapagos Islands. Each species of finch had a different shaped beak. WHY?

1.Ground Finch- Heavy beak for eating large, heavy seeds. 2.E 3.Cactus Finch- Tough, longer beak for getting seeds out of cactus plants. 4.Warbler Finch- Small narrow beak used to catch small insects.

Natural Selection  Natural Selection- The process by which organisms that are better adapted to their environment survive and reproduce more successfully than the less well adapted organisms do.