Across
- 3. all of the populations of species in an area
- 4. a group of organisms with similar characteristics
- 7. a single living thing
- 8. a balance of populations of organisms
Down
- 1. an organism that is not living or alive
- 2. all nonliving and components of an ecosystem
- 5. abiotic and biotic factors in an area
- 6. a group of interacting species in an area