1. Evolutionary Theories

2. Theories of Evolution ACQUIRED
LONGER NECK TO EAT FROM THE TALLER TREES
STRETCHING
STRETCHING
AND this got passed to children!
ORIGINAL

3. Let’s think about this…
These are all ENVIRONMENTAL changes! You cannot pass down your environmental choices, only your GENETIC code!
Where do you get your traits from?
MOM and DAD
So…..
NO!!!!
If your Mom decided to get a giant tattoo of a clown on her back, does that mean you will have a giant clown tattoo?!!
NO!!!!
If your Dad decides to become a body builder and goes to the gym for 10 hours a day, will he be able to pass his muscles onto you?!!
Your Mom’s hair is brown, but she dyed it blonde. Will she be able to pass her new hair color on to you?!!
NO!!!!
Your Dad is a smoker and acquires lung cancer from smoking cigarettes for many years. Does that mean he can pass his lung cancer on to you?!!!
NO!!!!

4. So if Lamarck’s theory wasn’t so great…
NATURAL
SELECTION
VARIATION
VARIATON
HERITABLE

5. COMPETITION
MORE
COMPETE
SURVIVE

6. NATURAL SELECTION FIT TRAITS PASS ON
If the environment is SNOWY and COLD…
White Fur
Brown Fur
Those that are more successful….
Makes it EASIER to hide from predators
Makes it HARDER to hide from predators
Get more FOOD
Makes it EASIER to sneak up to catch prey
Makes it HARDER to sneak up to catch prey
Which makes them STRONGER
Which attracts more FEMALES
Which means more BABIES with THEIR GENES
Future generations look more like the most “fit” organism

7. FITTEST
NATURE
SELECTED

8. Important Vocabulary…
EVOLUTION
MATE
FERTILE
VARIATION
ADAPTATION

9. How would Darwin explain the Giraffes…?
VARIATION
Most with SHORTER necks
Occasionally some with LONGER necks
LONGER neck = easier time getting food
COMPETITION
Food = survival
LONG NECK = BETTER TRAIT
NATURAL SELECTION
LONG Neck giraffes more successful in obtaining food and mates
LONG neck gene is passed on because it is the more successful trait
Future generations look more and more like the successful traits – LONG NECK giraffes

10. Practice EOC Question

11. Select 1 of the following activities:
Activity 1:
Pretend you are Charles Darwin. Write a letter to Lamarck explaining why your theory of evolution is the most logical. Be sure to include scientific evidence to support your claims. Your letter should be at least a page in length and free of errors. You may also use images to support your explanation.
Activity 2:
Select an adaptation of a plant or animal. Write a scenario explaining how the trait might have evolved according to Lamarck, then write a second scenario explaining the chosen adaptation using Darwin’s ideas. Use images to support your explanation. Your explanation must include all the key ideas of each theory. Must be one page in length and free of errors.
Activity 3:
Using the textbook and your notes, answer the following questions from the book. Answers questions in complete sentences, unless it is multiple choice. You will lose points if you fail to do so! All responses must be in your own words!
Pg. 389: #11, 15, 16, 18, 19, 21, 25
Pg. 390: #28, 31, 34
Pg. 391: #1, 2, 9, 10