| A | B |
| Biological Evolution | Change in the inherited traits of a population oof organisms that occurs over many generations |
| Camouflage | Coloring or markings that help an organism blend in with its surroundings |
| Industrial Revolution | Period of industrialization that began in the late 18th century and continued through the 19th century |
| Lichen | A combination of 2 primitive organisms, a fungus and green algae. Forms a thin "crust" on rocks and tree trunks |
| Morph | A distinct form of a given species |
| Natural Selection | The process by which favorable inherited traits become more common time. Darwin proposed that this was the primary mechanism of biological evolution |
| Peppered Moth | A common moth found in Europe, Asia, and North America |
| Tree trunks became darker during the Industrial Revolution during the 19th century | becasue the air was polluted with black soot |