Across
- 3. Any difference between individuals of the same species
- 7. Occurs when natural selection favors one of the extreme variations of a trait
- 9. An environmental factor that favors certain phenotypes in a population
- 10. The struggle between organisms to survive in a habitat with limited recourses
- 11. Occurs when a species no longer has any known living individuals
Down
- 1. Form of natural selection in which individuals near the center of a distribution curve have higher fitness than individuals at either end of the curve
- 2. A process where individuals that have certain inherited traits tend to survive and reproduce better than other individuals because of those traits
- 4. Inherited characteristics that increase an organism's chance to survive in that environment
- 5. Change in genetic material that leads to a different trait
- 6. Type of natural selection that favors both extremes of the phenotype range
- 8. The gradual change in a species over time