1. Do now activity #1 Define Common Ancestor in your own words.
At least how many years does it take for an evolution to take place?
True or False: Animals are fit when they are the strongest on the planet.
If the #3 is False, re-write it to make it a True statement.

2. Do now activity #2 Name all types of evidence that support evolution.
According to natural selection, how do species evolve?
True or False: There are five types of evolutionary evidence.
If the #3 is False, re-write it to make it a True statement.

3. Section 6-2: evidence of evolution
Essential Question:
How does the evidence of evolution support the theory that all organisms evolved from a common ancestor?
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 6-2: evidence of evolution

4. announcements Biology Tutoring this week:
Lunch B (Tuesday & Thursday)
7:00AM (Monday – Friday)
After school Biology Tutoring: Tuesday
Syllabus must be turned in by today
Lab tomorrow, no make ups!

5. announcements Available Extra Credit: Tissue Box = 2 Points
6.6oz bag of Goldfish (Pretzel/Cheddar) = 5 Points

6. Don’t forget to chunk your notes!

7. There are 5 sources of evidence to support the theory of evolution.
overview

8. The 5 types of Evidence for Evolution are:
overview
The 5 types of Evidence for Evolution are:
Fossils
Geography
Development
Homologous structures
DNA

9. 1. Fossil record
Fossils are preserved remains of ancient ________ that provide a ______ of how organisms have evolved.
Organisms/record

10. 1. Fossil record
Fossils are preserved remains of ancient organisms that provide a record of how organisms have evolved.

11. 1. Fossil record Living things change over time
Fossils help prove that:
Living things change over time
Earth is many millions years old

12. 2. geography
Animals on different continents have similar adaptations…
BUT
…come from different ______ .
ancestors

13. 2. geography Similar __________ happen when there are similar:
Environments
Natural selection situations
adaptations

14. 3. Developmental similarities
Similarities in Early Development
Embryo cells of all vertebrates develop:
in the same order
in similar patterns
to produce tissues and organs
How do these cells develop?
Mitosis!

15. 4. Homologous structures
Similarities between arms, wings, legs, and flippers
same basic bones
different functions
develop from the same embryonic tissues

16. 4. Homologous structures
Vestigial Organs:
Structures that have no function
They have no affect on an organism’s survival

17. 4. Homologous structures
Example:
Your appendix
Tonsils
Wisdom teeth
Hip bone in whales

18. This is new!
Now we can compare the DNA of different organisms to see how closely or distantly related they are.
5. DNA