1. 10.2 Darwin’s Observations
Points to Ponder
Open your book to pg. 299
Please read about Jean-Baptiste Lamarck and on pg. 4 of your notebook list three of his theories about Evolution

2. Jean-Baptiste Lamarck
10.1 Early Ideas About Evolution
Jean-Baptiste Lamarck
All organisms evolved toward perfection and complexity
He did not think that species became extinct- He thought they evolved into different forms
Environmental change causes an organism’s behavior to change, which leads to use or disuse of a structure
structure would become smaller or larger
would pass this trait on to offspring, leading to change over time

3. 10.2 Darwin’s Observations
Analyze this picture of a baleen whale. Using the ideas of Jean-Baptiste Lamarck (pg. 299) tell me why this whale has a pelvis and a femur.
PELVIS
FEMUR
PELVIS
FEMUR

4. Diacodexis
(55 m.y.a.)
Pakicetus
(52 m.y.a.)
Ambulocetus
(50 m.y.a.)
Dorudon
(40 m.y.a.)
Baleen Whale
(Present day)

5. Diacodexis
(55 m.y.a.)
Pakicetus
(52 m.y.a.)
Ambulocetus
(50 m.y.a.)
Dorudon
(40 m.y.a.)
Baleen Whale
(Present day)

6. Diacodexis
(55 m.y.a.)
Pakicetus
(52 m.y.a.)
Ambulocetus
(50 m.y.a.)
Dorudon
(40 m.y.a.)
Baleen Whale
(Present day)

7. Diacodexis
(55 m.y.a.)
Pakicetus
(52 m.y.a.)
Ambulocetus
(50 m.y.a.)
Dorudon
(40 m.y.a.)
Baleen Whale
(Present day)

8. Diacodexis
(55 m.y.a.)
Pakicetus
(52 m.y.a.)
Ambulocetus
(50 m.y.a.)
Dorudon
(40 m.y.a.)
Baleen Whale
(Present day)

9. Set up Cornell Notes on pg. 5
Topic: 10.2 Darwin’s Observations
Essential Question:
(p.4) Make a double- bubble map comparing and contrasting variation and adaptation (give examples of each)
10.2 Darwin’s Observations
2.1 Atoms, Ions, and Molecules
(p.4) Make a double-bubble map comparing and contrasting variation and adaptation (give examples of each)

10. 10.2 Darwin’s Observations
KEY CONCEPT Darwin’s voyage provided insight on evolution.

11. 10.2 Darwin’s Observations
Meet Charles Darwin
Educated in Natural History
Hired on the HMS Beagle as the ship’s naturalist
He collected many organisms
He formulated the idea that each species had developed from ancestors with similar features

12. The Voyage of the Beagle
10.2 Darwin’s Observations
The Voyage of the Beagle
In 1831 The HMS Beagle set sail
The voyage took 5 years
He read Lyell’s Principles of Geology
Darwin spent most of his time on shore observing species, where he found much evidence supporting Lyell’s views

13. 10.2 Darwin’s Observations
Darwin noticed the variation of traits among similar species that he observed in his travels…
Variation- is the difference in the physical traits of an individual from those of other individuals in the group to which it belongs

14. 10.2 Darwin’s Observations
Interspecific variation
Variation among different species
Intraspecific variation
Variation among the same species

15. 10.2 Darwin’s Observations

16. 10.2 Darwin’s Observations

17. 10.2 Darwin’s Observations
During Darwin’s journey he noticed that the differences among the species seemed well suited to the animals’ environment and diet
Discuss giraffes.
These observations led Darwin to realize that species may somehow be able to adapt to their surroundings

18. 10.2 Darwin’s Observations
An adaptation is a feature that allows an organism to better survive in its environment.
Species are able to adapt to their environment.
Adaptations can lead to genetic change in a population.

19. 10.2 Darwin’s Observations
What adaptations do these animals have? Why do they need those adaptations?
Camel
Cheetah
Mountain Goat
Giraffe

20. Please come up with your own animal and adaptation
10.2 Darwin’s Observations
Please come up with your own animal and adaptation
What is the name of the animal?
What is its adaptation?
Why does it need that/those adaptation(s)?
food?
camouflage?

21. 10.2 Darwin’s Observations
Compare these two tortoises. Note their looks and think about what type of food they would be able to eat.

22. Darwin observed differences among island species.
10.2 Darwin’s Observations
Darwin observed differences among island species.
Saddle-back tortoises that live in areas with tall plants
have long necks and legs
Domed tortoises live in wet areas rich in mosses and short plants
have shorter necks and legs

23. 10.2 Darwin’s Observations
Darwin observed fossil and geologic evidence supporting an ancient Earth.
Darwin found fossils of extinct animals that resemble modern animals.
Glyptodon
Armadillo

24. 10.2 Darwin’s Observations
Darwin found fossil shells high up in the Andes mountains.
Darwin observed an Earthquake
He saw land move from underwater to above sea level
Supported the theory that small daily geologic activity can lead to great changes over time
Darwin extended his observations to the evolution of organisms.

25. Variation vs. Adaptation Poster
Please create a "Variation vs. Adaptation" Poster 1. Split your poster into four squares Box #1: Interspecific variation Box #2: Intraspecific variation Box #3: Animal Adaptation #1 Box #4: Animal Adaptation #2 2. In each box draw a picture that demonstrates either the type of variation or animal adaptation. 3. Explain each picture and how it relates to either variation or adaptation: what are their specialized adaptations, what are they used for? Edmodo Directions (Comic Life/Pages/Keynote) PDF!!!!!: 1. Find two examples that demonstrate variation (2 interspecific, 2 intraspecific) 2. Explain what variation is, and the two types 3. Find four examples of animals with specialized adaptations 4. Explain each animal and what their adaptations are, and what they are used for

26. Interspecific Variation
vs.
Polar Bear
Grizzly Bear
vs.
Blue Whale
Killer Whale
Interspecific variation: is variation among individuals of different species