Natural Selection
Across
- 2. English naturalist; put forth theory of natural selection to serve as the mechanism for how evolution occurs.
- 7. French naturalist; put forth idea that acquired traits are heritable.
- 8. A measure of how well an organism can survive in its environment.
- 10. Individuals do not evolve, _____ do!
- 11. Organisms with the best traits (adaptations) will live longer and reproduce more than others, causing changes in a population over time by acting on traits that are heritable.
Down
- 1. An inherited characteristic that increases an organism's chance of survival.
- 3. The process of biological change by which descendants come to differ genetically from their ancestors.
- 4. Able to be passed from one generation to the next.
- 5. The combined alleles of all individuals in a population.
- 6. The ultimate source of variation on Earth.
- 9. Differences in the physical traits of organisms.