| A | B |
|---|
| Biotic | Living components of an ecosystem |
| Abiotic | Nonliving components of an ecosystem |
| Species | organisms of the same type that can breed and produce fertile offspring |
| population | a single species in a specific place at a specific time |
| community | all living organisms in a specific place at a specific time |
| ecosystem | all of the biotic and abiotic factors of a specific place |
| ecology | the study of how living things interact with each other and with their environment |
| biosphere | the air, water, and land where organisms live |
