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

2. The story of the Soapberry bug and the antibiotic resistant bacteria.

3. Natural selection is a process of editing, not a creative mechanism.
A drug/fruit does not create a different species it selects for specific traits in a population that allow it to survive it that specific environment.

4. 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!

5. 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

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

7. 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

8. 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.

9. 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.
Supporting Darwin’s thought that only those who have the best traits for the environment will find the space, food, etc.

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

11. 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
Adaptations
Survival of the fittest

12. Darwin’s Evidences 1. Fossil Record 2.Biogeography: Geographical
Distribution
3. Vestigial Organs
4. Similarities in Structure
Homologous Structures
5. Similarities in Early development
Embryology
Yes, I can support it!

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

14. Comparing fossils to present day organisms not only show changes but also what species have become extinct.
Position of fossils can reveal their age.
Younger
Older

16. 2. BIogeography
Organisms in different parts of the world shared similarities (continental drift)
Ex. Endemic species

17. 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 a pelvis!!!

18. 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

19. Homologous
Homologous structures: similar structures but have different function
Derived from a common ancestor; different environment conditions
Ex. Forelimb

20. Analogous
Analogous structures: similar function but not similar in structure
Not derived from a common ancestor; same environmental conditions
Ex. A butterfly wing and a bird wing

21. 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
Posterior tail, pharyngeal pouches

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

23. Class Activity
Adopt an Embryo!

24. Adopt and Embryo
Stage 2

25. Adopt an Embryo
Stage 3

26. Darwin’s Evidences 1. Fossil Record 2.Biogeography: Geographical
Distribution
3. Vestigial Organs
4. Similarities in Structure
Homologous Structures
5. Similarities in Early development
Embryology
Yes, I can support it!

27. Evolution….”just a theory”….
Life has changed over time, documented and supported

28. Homologous vs. Analogous Activity
Homologous Structure
Analogous Structure
Same Structure different function
Same function different structure
Instructions:
Read
Define
Color
Chart
Answer Questions