1. Darwin’s Theory of Natural Selection EQ: How does evolution occur
Darwin’s Theory of Natural Selection EQ: How does evolution occur? Date: Spiral pg.

2. How does Natural Selection work?
What important observations did Darwin make on his voyage?
What is a theory?
How does Natural Selection work?

3. Darwin’s Observations
Darwin made many observations as he sailed the HMS Beagle to the Galapagos Islands:
Diversity of living things
Fossil bones of animals that died long ago
A fossil is the preserved remains or traces of an organism that lived in the past.
Adaptations, a trait that helps an organism survive and reproduce in its environment
Examples: Bird Beaks

6. Natural Selection
Darwin proposed that evolution occurs through a mechanism called Natural Selection.
Natural Selection, individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species

7. Evolution Darwin’s Reasoning:
Darwin’s ideas are referred to as the theory of Evolution
Evolution, the gradual change in a species over time
A Scientific Theory is a well-tested concept that explains a wide range of observations.

8. Factors of Natural Selection

9. Factors of Natural Selection
Overproduction: organisms produce more offspring than will survive. EX: sea turtles & insects
2. Variations: differences among individuals.
3. Competition: organisms compete for resources.
4. Selection: those organisms with the best adaptations will survive and reproduce.

14. Evolution
Selective Breeding: The process of modification of a species through human actions which encourage the breeding of certain traits over others
Examples:
Dogs

15. Complete on p. 110 in your notebook
Over Production
Make a
Flow Chart
To demonstrate
The factors of
Natural Selection
Variations
Competition
Selection
Survival and Reproduction