1. What causes species to evolve over time?
Essential Question:
What causes species to evolve over time?
Learning Target
Provide evidence from several sources that all organisms have evolved from a common ancestor.
Explain the four factors that result in the evolution of a species.
Section 5-1: evolution

2. announcements
Biology Tutoring:
1:00PM
By appointment

3. Don’t forget to chunk your notes!

4. Charles Darwin was an English scientist.
overview
Charles Darwin was an English scientist.

5. Darwin traveled to the Galapagos Islands aboard the H.M.S. Beagle.
overview
Darwin traveled to the Galapagos Islands aboard the H.M.S. Beagle.

6. overview
Book: “The Origin of Species”
Darwin publishes his theory 25 years after his voyage on the Beagle.

7. Darwin observed the finches on _____ island.
overview
Galapagos
Darwin observed the finches on _____ island.
Galapagos

8. The birds were similar, but they had different shaped _____ .
overview
The birds were similar, but they had different shaped _____ .
beaks
beaks

9. Why are all of these different?
These are all ___.
They are all made by ___.
Why are all of these different?
sports
Shoes/Nike
Because different sports, played on different terrain and environments

10. These finches probably shared a common _______ .
overview
These finches probably shared a common _______ .
ancestor
ancestor

11. These finches probably shared a common ancestor.
overview
These finches probably shared a common ancestor.

12. Darwin collected fossils.
Galapagos island
Darwin collected fossils.
Some fossils looked like organisms that were still alive.
Others looked completely unlike any creature he had ever seen.

13. Size of a large football
Extinct Glyptodon
11/13/2018
Size of a VW Beetle car
Armadillo mm
Size of a large football

14. 11/13/2018
What does this mean?
Common ancestor
This means that they could have had a _______ _______ millions of years ago! mm
common
ancestor

15. Galapagos island
shell
Darwin observed that tortoises from different islands had different ______ shapes.
shell

16. Galapagos island
Even though these tortoises are different, how come they have so many similarities?
Common ancestry from before the geographic split

17. Evolution
Darwin thought, “Maybe a long time ago the turtles living on different islands all belonged to the same species!”
Common ancestor

18. These different species would have evolved from a common ancestor.
evolution
These different species would have evolved from a common ancestor.

19. These different species would have evolved from a common ancestor.
evolution
These different species would have evolved from a common ancestor.

20. Evolution = change over time ****It takes a long time to happen****
Millions of years
Evolution = change over time ****It takes a long time to happen****

21. Evolution = change over time ****It takes a long time to happen****
Millions of years
Evolution = change over time ****It takes a long time to happen****

22. Evolution
Hutton and Lyell proposed that geological forces shaped the Earth over Millions of years.
Pangea

23. Darwin proposed the theory of _______ ______ .
Natural selection
Natural selection
natural
selection
Darwin proposed the theory of _______ ______ .

24. Natural selection
The turtles on _______ Island probably had a common ______ . Then Pangea caused their evolution through _____ selection.
Galapagos/ancestor/natural
Galapagos
ancestor
natural

25. Natural selection

26. Natural selection
There are turtles that have necks that can eat food on low and high ground.

27. Turtles with long necks can reach for food.
Natural selection
Turtles with long necks can reach for food.

28. Turtles with short necks only eat food on the ground.
Natural selection
Turtles with short necks only eat food on the ground.

29. Do now activity
How come some islands only have turtles with long necks and others only have turtles with short necks?
At least how many years did it take for these turtles to evolve?