1. Natural Selection pp

4. NATURAL SELECTION four main supporting ideas
1. Overproduction: environment limits how big the population can get

5. 2. Genetic variation: not all organisms have the exact same trait
EX. Some stronger, faster, different color, etc.

6. Most traits arose due to mutation in the population long ago and now
Only increase in frequency due to the change in the environment

7. 3. Struggle to survive: individuals compete for resources and certain traits make an individual more successful
adaptation: a trait in a population passed onto offspring that makes them better suited

8. 4. Differential reproduction: organisms with the best adaptations are more likely to survive and pass on those traits
fitness: ability of an organism to survive to pass on genes

9. ARTIFICIAL SELECTION
Humans breed for specific traits causing differences in species (i.e. dog breeding)

10. SEXUAL SELECTION
Humans choose mates based on specific traits and those traits increase in the population