1. Human Evolution Evidence for Evolution
Ideas that shaped Darwin’s thinking

2. Ideas that shaped Darwin’s thinking
Prior to Darwin’s Theory of Evolution there were 4 scientists that had their own ideas and theory’s
1. Hutton
2.Lyell
3.Lamarck
4. Malthus
The Rock Boys!!
The Math guy!

3. James Hutton
Helped scientists understand that Earth is many millions of years old
Processes that changed the Earth in the past are the same processes that operate in the present

4. Charles Lyell In Lyell’s book: Principles of Geology
Rock Cycle: Volcanoes and Earthquakes
Erosion continues to carve out canyons.

5. Uniformitarianism
Uniformitarianism: the natural laws and processes that operate in the universe now, have always operated in the past.
How do you pronounce that??
Uniformitarianism

6. Jean-Baptiste Lamarck
Use or disuse of organs, organisms acquired or lost certain traits during their lifetime.
Traits could then be passed on to their offspring.

7. Thomas Robert Malthus
Malthus reasoned that if the human population continued to grow unchecked, sooner or later there would be insufficient living space and food for everyone.
Do you remember:
Density Independent factors
Density dependent factors

8. Thomas Robert Malthus
He theorized that there was a “carrying capacity” in every habitat/ environment
Populations will naturally get checked by famine, disease etc.

9. Darwin’s Theory of Evolution
1. Change over time, common ancestor
Pre-existing variation
2. Variation within a population or species
Everyone is just a little different
3. Natural selection
Survival of the fittest

10. Darwin’s Evidences 1. Fossil Record 2. Geographical Distribution
Yes, I can prove it!
1. Fossil Record
2. Geographical Distribution
3. Similarities in Structure
Homologous/Analogous Structures
4. Vestigial organs
5. Similarities in Early development
Embryology

11. 1. Fossil Record
Preserved remains or markings left by organisms that lived in the past are called fossils.

12. Position of fossils can reveal their age.
Younger
Older

13. 2. Geographical distribution
Organisms in different parts of the world shared similarities

14. 3. Vestigial Organs
Organs of many animals are so reduced in size that they are just vestiges, or traces, of homologous organs in other species
I have toe nails!!!

15. 4. Similarities in structures
Homologous structure: same basic structure but different function
Analogous structure: same basic function, but do not have the same basic structure

16. Homologous
Homologous structures: similar structures but have different function
Derived from a common ancestor
Ex. Forelimb

17. Analogous
Analogous structures: similar function but not similar in structure
Not derived from a common ancestor
Ex. A butterfly wing and a bird wing

18. 5. Similarities in Early development
Common pattern in the development
In their early stages, chickens, turtles, and rats look similar, providing evidence that they shared a common ancestor

19. Lets Play a Game Adopt an Embryo!
Select one embryo to adopt as your own!!

20. Class Activity
Adopt an Embryo!

21. Adopt and Embryo
Stage 2

22. Adopt an Embryo
Stage 3

23. Darwin’s Evidences Review
Yes, I can prove it!
1. Fossil Record
2. Geographical Distribution
3. Similarities in Structure
Homologous/Analogous Structures
4. Vestigial organs
5. Similarities in Early development
Embryology

24. Homologous vs. Analogous Activity
Homologous Structure
Analogous Structure
Same Structure different function
Same function different structure
Instructions:
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