Across
- 3. a community of living organisms interacting with their physical environment
- 5. the study of relationships between living organisms and their physical environment
- 6. an organism that makes its own food
- 9. an organism that lives in another species and derives nutrients at the other's expense
- 11. the number of organisms an ecosystem can sustainably support
- 12. found in or produced by the sea
Down
- 1. the process by which an organism maintains a stable internal environment
- 2. an animal that feeds on dead organic material
- 4. a group of similar organisms that are able to reproduce
- 7. the association between two organisms of different species in which both benefit
- 8. the act of preying on another animal
- 10. an animal that only eats meat