1. 33L 33R Natural Selection 1/5/15 Catalyst:
Pick 2 interesting birds and describe what you notice about them and how they differ
How can you imagine that their beaks helps them survive in the wild?
Reflection:
33L
33R

2. Pick 2 interesting birds and describe what you notice about them and how they differ
How can you imagine that their beaks helps them survive in the wild?
Catalyst

3. Darwin’s finches Galapagos video
(starting at 7:19)

4. Natural Selection
If all the food in this environment were tall trees, which giraffe is most likely to survive?
Describe the giraffe’s adaptations, and explain why it is more likely to survive.

5. Darwin’s Finches: Adaptive Radiation

6. Today’s Lab Activity
You will use utensils to simulate how different bird beaks work
You will explore the way different bird “beaks” effect how and what you eat
These utensils are your adaptations to the environment

7. Materials Adaptation: “Bird Beaks” simulated by utensils: Spoon Fork
Pipette
Tweezers

8. Materials Environments: “Food” items simulated by: Beans Rubber Bands
Beads

9. Make a prediction:
WHICH bird beak (Fork, spoon, pipette, tweezers) do you think will collect the most food item (rubber bands, beads, beans) and WHY?

10. Natural Selection 1/5/15
Catalyst:
Hypothesis:
Pick 2 interesting birds and describe what you notice about them and how they differ
How can you imagine that their beaks helps them survive in the wild?
Reflection:

11. Procedure My adaptation is ____________ Pour food item into tray
You have 30 seconds to pick up food and place in cup
Count food items in cup

12. Natural Selection 1/5/15
Catalyst:
Hypothesis:
Procedure:
My adaptation is ____________
Pour food item into tray
You have 30 seconds to pick up food and place in cup
Count food items in cup
Pick 2 interesting birds and describe what you notice about them and how they differ
How can you imagine that their beaks helps them survive in the wild?
Beans
“Worms”
Beads
Reflection:

13. Graph number of food items for each type of bird beak20 15 10 5
Number food item
Fork Spoon Pipette Tweezers
Beak

14. Analysis
Which 2 beaks worked best for each different food item (fastest, most food…)?
A 5-year drought kills all the “rubber band” trees but the “bean” and “bead” trees survive.
What do you predict will happen to the different bird species living in that environment?

15. Generalist vs. Specialist
A generalist bird “beak” might be….
A specialist bird “beak” might be….

16. Whale specialists vs. generalists
Orca whales are generalists and family pods will prey on whatever food item is abundant

17. Whale specialists vs. generalists
Baleen whales are specialists and only feed on krill (tiny plankton)

18. Round Robin
Give an example of camouflage and explain how it works.

19. Watch camouflage videos

20. Adaptation: Camouflage

21. Question
Why would natural selection result in some frogs that are camouflaged, but other frogs to be bright with contrasting colors?

22. Adaptation: Camouflage
How might camouflage be an adaptation?
We will simulate natural selection of camouflage in class today

23. Predator vs. Prey Why might both be camouflaged?
Not all organisms are camouflaged. What reasons can you imagine?

24. Sexual Selection
Peacock
Peahen

25. Warning coloration
Monarch caterpillar

26. Natural Selection 1/5/15
Catalyst:
Reflection:
Given what you have learned about natural selection, how do you believe that the different forms of camouflage have evolved?