| A | B |
|---|
| ecosystem | includes all the different organisms living in a certain area, along with their physical environment |
| biotic factors | the living parts of ecosystem |
| abiotic factors | the nonliving parts of an ecosystem |
| species | a group of organisms that are able to produce fertile offspring, and that share common genes |
| population | a group of individuals of the same species living in a particular place |
| community | a group of interacting populations of different species |
| niche | an organism's way of life |
| habitat | where an organism lives |
| organism | one individual living thing |
