1. Bellringer:
What characteristics do you think help this chameleon survive?
What helps it hunt for prey?

2. Evolution, Natural Selection, and Adaptations
Section Two
Evolution, Natural Selection, and Adaptations

3. I. Evolution by Natural Selection
Charles Darwin proposed the theory of Evolution and Natural Selection.
Organisms w/in a population have similar but different characteristics.
2. These differences (unique traits) give some organisms a survival advantage in their environment.
3. Natural Selection = unique traits being passed from one generation to another.

4. 4. Over many generations, the overall characteristics of a population change is Evolution.
B. Nature is the driving force of evolution.
1. An environmental change can cause organisms to be:
Selected FOR
Selected AGAINST

5. 2. Organisms with traits better suited to their environment are better able to survive.
These organisms will pass these traits on to future generations.
ii. Advantageous traits = adaptations.
C. Artificial Selection – man controlling the traits of organisms
Examples: dog breeds, fruits, grains, vegetables

6. Assignment:
Pg. 96, questions 1- 4
Pg. 101, questions 1 – 4
Answers ONLY, do not write the questions
Due at the end of class.