1. 4/8 Daily Catalyst Pg.43 Comparative Anatomy
1. How could radioactive dating help analyze a fossil?
A) Determining the fossil’s age.
B) Determining whether the fossil was animal or a plant.
C) Determining the mass of the fossil.
D) Determining the size of the fossil.
2. The odd beetle lives in Asia and North America. It normally feeds on animal fur and hair. During the winter time, animals fur are long and plentiful, but during the summer, animals lose their fur coat. How would the odd beetle population be effected, if global warming continues to rise the earth’s average temperature?
Fossils
I, B, F, M, H, R
Next Monday!!

3. 4/8 Class Business Pg.43 Comparative Anatomy
Quiz #11 on Friday
Evidence for Darwin’s Theory
Evolution test on Thursday, April 16th
Study guide due test day
Review day on Wednesday, April 15th
Quiz #12 on Review day
Human body begins on Friday, April 17th
Zaven- see Mrs. Ireland after class

4. 4/8 Daily Catalyst Pg.43 Comparative Anatomy
Class Business
Explore Activity Warm up
Anatomy Notes
Fossil Range project
Exit Ticket #9 Anatomy
Homework: anatomy assignment

5. 4/8 Objective
We will be able to explain how anatomical evidence supports Darwin’s theory of evolution.

6. Darwin believed in natural selection: good traits

7. Pg. 36
Fossils
Comparative Anatomy

8. Explore Activity
Directions: As a group, complete the explore activity. There may be some unfamiliar vocabulary terms. Give me your best effort!
Noise: 2 (with group)
Time: 12 minutes

9. 1 2 3 4 5 6 7 8 Stephanie Eva Kayla Travis Fabien Amani Stephen Smokey
Brian
Nicoh
Chris E.
Chase
Ridel
Alfred
Eliud
Jonathan
Terriyan
Andrea
Nick
Wyatt
Hefer
Daniel G.
David
Eric
Francisco
Darrius
Eduardo
Avery
Daniel V.
Barrian
Zaven

10. NOTE TIME!!- Pg. 43 Key Point #1: Anatomy-
Definition: The study of structures
Today, we will compare anatomy of various organisms and look at how organisms have evolved over time to better adapt to their environment.

11. Comparative Anatomy
There are 3 types of structures we will look at today.
Homologous
Analogous
Vestigial
Be ready to take some notes!

12. What do you notice about these structures?
Common Ancestor
They have similar bones. Do all of these organisms have the same bones? No, just similar. Do all of these structures have the same function? No. what is the same with these organisms? They have the same ancestor.

13. What do you notice about these structures?

14. Key Point #2: Key Point #2: Homologous
Homo- same
Logous- position
Organisms have the SAME ancestor and structure but different functions.
Why?
Different environments
Do they share DNA? Yes, that is why they have similar bones.

15. Homologous Structures
Evidence for Evolution: Show that two species evolved from a common ancestor and have similar evolutionary origins.
But….
Adapt to live in different environments

16. What do these organisms have in common?
These organisms all have large ears. Why? They all live in a similar environment which is hot and the ears disspate heat.

17. What do these organisms have in common?

18. Key Point #3 Key Point #3: Analogous
Ana- different
Logous- position
Organisms have DIFFERENT structures and ancestors but used for similar functions
Why?
Similar environments!

19. Analogous Structures But….. They have different ancestors
Evidence for Evolution: Show that when organisms live in similar environments, they will adapt in similar ways to survive.
But…..
They have different ancestors

20. What is the purpose of wisdom teeth?
They used to have a purpose, but they are no longer needed.

21. Why do whales have hip bones if they don’t have legs?
They are no longer needed

22. Key Point #4 Key Point #4: Vestigial Body part that is no longer used.
Vestige: small, remaining part
Body part that is no longer used.
Why?
Environment no longer needs it

23. (they once needed the structure and now they do not!).
Vestigial Structures
Evidence for Evolution: Show that a species has changed over time
(they once needed the structure and now they do not!).

24. Practice Time!

25. Analogous: similar function
Is the body shape, homologous, analogous, or vestigial?
Analogous: similar function

26. Homologous, analogous, or vestigial?
Analogous: similar functions

27. Letter “c” = hind legs of a baleen whale skeleton
Vestigial: no longer used!!!

28. HOMOLOGOUS: similar bone structure
Alligators and bats have the same bone structure in their forelimbs (front legs for alligators, wings for bats).
HOMOLOGOUS: similar bone structure
After revealing the correct answer, ask random students to explain how the structure supports evolution

29. Humans have wisdom teeth (third molars), even though they are not needed to chew up food.
After revealing the correct answer, ask random students to explain how the structure supports evolution
VESTIGIAL

30. ANALOGOUS Birds and insects both have wings to fly the sky
After revealing the correct answer, ask random students to explain how the structure supports evolution
ANALOGOUS

31. Snakes don’t have legs, but they do have small hip and leg bones.
After revealing the correct answer, ask random students to explain how the structure supports evolution
VESTIGIAL

32. Fossil Range Pg. 41 Fossil Range
Directions: Answer the data analysis questions in your notebook on page 41. This project is due today. Leave your notebook on the counter in the back of the class.
Time: 15 minutes
Noise: 1 (partner)

33. Work time
Directions: Answer the questions in your notebook. You may work with a partner. This is homework, if you do not finish. The assignment will be checked tomorrow.
Time: 10 minutes
Noise: 1 (partner)

34. Exit Ticket #9 Name: _________ Period: 2 Date: 4/8 Score: ___/4
This type of structure…
1. An organism has this structure, but no longer uses this structure.
2. Is seen in multiple organisms because it came from a common ancestor.
3. Is seen in multiple organisms because they live in similar environments.
4. Name the theory that explains why Pangaea split apart.
Student Choice – there’s a WOW factor!

35. Name Exit Ticket #9 This type of structure…
1. An organism has this structure, but no longer uses this structure.
Vestigial
2. Is seen in multiple organisms because it came from a common ancestor.
Homologous
3. Is seen in multiple organisms because they live in similar environments.
Analogous
4. Name the theory that explains why Pangaea split apart.
Continental Drift
Student Choice – there’s a WOW factor!