| A | B |
|---|
| Niche | An organism's way of life. |
| Habitat | The place where an organism lives |
| Population | A group of individuals from the same species living together. |
| Ecosystem | Includes all organisms in a certain place and their physical environment |
| Natural Selection | Unequal survival and reproduction |
| Competition | Organisms attempting to access the same resources |
| Species | Organisms that resemble each other and can reproduce together |
| Adaptation | An inherited trait that would increase one's survival |
| Extinction | The disappearance of a species |
| Evolution | A change in the genetic characteristics of a poulation |
| Organism | An individual living thing |
| Community | A group of interacting populations of a different species |
| Predation | The act of one animal killing and consuming another animal |
| Parasite | An organism that lives and feeds on other organisms without immediately killing them |
| Host | The organism that a parasite feeds upon |
| Mutualism | A cooperative partnership between two species |
| Commensalism | A relationship in which one species benefits and the other is neither helped nor harmed |
| Coevolution | When two or more species evolve in response to each other |
| Abiotic | Non-living parts of an ecosystem |
| Biotic | The living parts of an ecosystem |
