1. DARWIN’S THEORY OF EVOLUTION

2. Complete the graph at your table on Peppered Moths
BELLRINGER
Complete the graph at your table on Peppered Moths

3. Who is Charles Darwin?
Charles Darwin is best known for his theory of Evolution
He began developing his theory at age 22 when he took a job as a naturalist aboard the HMS Beagle which sailed around the world on a 5 year journey
Most of his observations were made on the Galapagos islands (chain of islands near the equator; just off west coast of South America)
Here he noticed several species of animals that were unique to each island but had similar counterparts on the other islands

4. DARWIN’S MAIN POINTS

5. There is variation among species
VARIATION: differences
SPECIES: individuals that look alike and can mate to produce fertile offspring
EXAMPLES: size, color, speed, beak shape, etc.

6. All living things struggle to survive
There are many limitations to survival
EXAMPLES: predation, availability of food & living space, disease, finding mating partners

7. Living things produce more offspring than can survive
to ensure that some will survive
Most will die before they reproduce

8. Nature favors those individuals that are better adapted to survive
This is called NATURAL SELECTION
Those individuals that do survive will likely reproduce & produce more offspring
Increases the population

9. PEPPERED MOTHS

10. In Summary… Darwin’s main points
There is variation among species
All living things struggle to survive
Living things produce more offspring than can survive
Nature favors those individuals that are better adapted to survive

11. LAMARCK’S EXPLANATION OF EVOLUTION
According to the diagram, how does Lamarck explain the changes that have taking place in giraffes over time?
Giraffes needed to reach higher branches as food was depleted, so they stretched their necks

12. MECHANISMS OF EVOLUTION
Select one of the pictures at your table.
Your task: figure out which mechanism of evolution your picture represents
See list on board for possible mechanisms and reference pages
Define/Describe your mechanism

13. Now join classmates that have same example
to confirm information
To explain how this example represents your process
Create a mini poster using schematic on next slide
BONUS: provide a second example of your process on back

14. EXPLAIN HOW THE EXAMPLE REPRESENTS THIS PROCESS
BONUS: provide a second example of your process on back
PROCESS
DEFINE/
DESCRIBE
PASTE PICTURE
EXPLAIN HOW THE EXAMPLE REPRESENTS THIS PROCESS