1. October 2017
Journal: What is a theory? Are theories always true?

2. Evolution

3. Evolution Definition
Process of genetic changes occurring within a population over many generations

4. Charles Darwin: The Father of Evolution
A. Darwin was NOT the first person to propose evolution… B. He did propose a way evolution happens called Natural Selection

5. Theory of Evolution by Natural Selection
Over time, the number of individuals that carry an advantageous trait in a population will increase
Success of the trait depends on the environment that the organism lives in

6. Examples of Natural Selection

7. Steps of Natural Selection
Overproduction: more offspring than can survive are produced

8. Steps of Natural Selection
Variation: there are differences between the traits in these offspring

9. Steps of Natural Selection
Selection: In a given environment, having a particular trait can make individuals more or less likely to survive

10. Steps of Natural Selection
Adaptation: Over time, the traits that improve fitness will become more common.
Fitness: The ability for an organism to survive and reproduce.

11. Types of Adaptations Physical Adaptations Behavioral Adaptations
Warning Coloration
Mimicry
Behavioral Adaptations
Horned Lizards
Octopus

12. October 2017
Journal: Give an example of an adaptation.

13. Speciation
The selection of various adaptations can help lead to speciation
The formation of a new species
Species – Group of organisms that are closely related and can mate to produce fertile offspring

14. How does speciation occur?
Reproductive Isolation: When two species can no longer interbreed to produce offspring
Geographic Isolation
Mating Behavior and Timing

15. Microevolution
Process that cause changes in the inherited traits observed in a population over time
Natural Selection
Migration
Mutation
Mate Choice
Genetic Drift: Random effects of everyday life that cause differences in survival and reproduction rates

16. Macroevolution
Convergent Evolution: Species in similar environments have similar adaptations

17. Macroevolution
Coevolution: Species that alive in close contact often evolve adaption to each other

18. Adaptive radiation: Over time, species split into one or more lines of descendants

19. Gradualism
Evolutionary change comes about gradually over time

20. Punctuated Equilibrum
Rapid change that results in a new species quickly

21. Descent with Modification
A. Over time, natural selection produces organisms with different structures B. Today’s species look different from their ancestors C. Each species descended with changes over time from a common ancestor

22. Extinction
All members of a lineage die off
Tasmanian Tiger
Quagga