| A | B |
|---|
| ecology | study of the interactions between organisms and their environment |
| biotic | living factors in an environment |
| abiotic | nonliving factors in an environment |
| population | a group of the same species living together in the same area at the same time |
| community | all the populations of different species that live and interact in an area |
| ecosystem | a community of organisms and its abiotic factors |
| biosphere | the part of the Earth where life exists |
| organism | lives independently and carries out life processes |
