1. The Theory of Evolution
What is Science?
It is observable and testable
Goal is to understand the world around us
Always changing as we continue to learn
Science CHANGES

2. What is a Theory?
Explanations supported by evidence
Unite facts
Evolution is a theory, like:
a. Gravity, electromagnetism, germ theory, plate tectonics

3. Evolution:
Changes in life over time (general)
Process by which modern organisms have descended from ancient organisms
Any change in the frequencies of alleles in a gene pool

4. 1. Lamarck: evolution worked through use and disuse (proven false)
History of Evolution
1. Lamarck: evolution worked through use and disuse (proven false)
A. Examples:
1) Lift weights and build muscle  kids will be strong
2) Giraffes: stretch neck to reach leaves on trees, offspring will have long necks

5. http://www. princessleia. com/images/MyImages/essays/giraffe_lamark

6. 2. Charles Darwin:
a. Voyage of the Beagle (1831 – 1836)
b. Galapagos Islands
c. Studied the diversity of Life
d. Theory of Natural Selection
e. Published “On the Origin of Species”
in 1859

7. http://colombianflowers. files. wordpress

8. LAST SLIDE!!!
Galapagos Finches: different size and shaped beaks that have evolved to take advantage of distinct food sources