Ecology

4. An organism that cannot make its own food
10. physical rather than biological; not derived from living organisms
12. All the different populations that live together in an area
13. A relationship between two species in which both species benefit
14. An organism's particular role in an ecosystem, or how it makes its living
15. Describes living factors in the environment

1. part of Earth in which life exists including land, water, and air or atmosphere
2. A group of individuals that belong to the same species and live in the same area
3. An organism that makes its own food
5. Scientific study of interactions among organisms and between organisms and their environment
6. level Each step in a food chain or food web
7. A relationship between two organisms of different species where one benefits and the other is harmed
8. Place where an organism lives
9. Largest number of individuals of a population that a environment can support
11. A relationship between two organisms in which one organism benefits and the other is unaffected