| Term | Definition |
| ecosystem | a particular enviroment where living things interact with other living things and non-living thing's. |
| species | living things of the same kind that are able to reproduce successfully |
| biological diversity | the variety of species and ecosystems on earth and the ecological processes of which they are part |
| population | group of indaviduals of the same species living in an area |
| community | a group of populations of different species living in the same area |
| kingdom | one of the five or six categories in the current classification system of living things |
| genetics | the study of how heritable charecteristics are transmitted through generations of organism's |
| genus | a category in the classification of living things, more general than a species. but more specific than a family |