Chapter 15

Darwin’s Theory of Evolution

Charles Darwin was a “naturalist”

15-1 The Puzzle of Life’s Diversity

1. Voyage of the Beagle

What is Evolution?

Discussion w/ Partner

1. Evolution- the inherited change in organisms over time.

• Charles Darwin sailed around the world collecting specimens of fossils, living plants, and animals.

2. Fossils- the imprints or remnants of organisms that lived a long time ago

3. After studying his specimens and other scientist information for decades Darwin concluded:a) All life organisms have a common

ancestorb) Organisms have descended w/

modification from their common ancestor

4. Darwin observed traits of many plants and animals were different among the islands of the Galapagos.

5. Darwin studied the specimen for years after he returned to England which allowed him to come to the conclusion that species change over time.