ecology

5. an organism that is able to form nutritional organic substances from simple inorganic substances
9. an organism deriving its nutritional requirements from complex organic substances.
10. a system of interlocking and interdependent food chains.
11. An organism that eats only animals
13. an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
14. nonliving part of an ecosystem that shapes its environment
17. organisms that consume other organisms to obtain their energy
19. an individual animal, plant, or single-celled life form.
20. a larger organism that harbors a smaller organism
21. an organism that eats plants and animals
22. the branch of ecology that works to understand the patterns and processes of change over time or space for populations of a single species.

1. the region on, above, and below the Earth's surface where life exists.
2. an animal that naturally preys on others
3. a biological community of interacting organisms and their physical environment.
4. an animal that feeds on carrion, dead plant material, or refuse.
6. A animal that is hunted or killed for food
7. the living components (organisms) that shape up the environment.
8. organisms that can make their food
10. a hierarchical series of organisms each dependent on the next as a source of food.
12. study of the organization and functioning of communities
15. each of several hierarchical levels in an ecosystem
16. branch of biology that deals with the relations of organisms
18. the natural home or environment of an animal, plant, or other organism.
20. An organism that eats only plants
22. the relationship between different species in which one organism lives on or in the other organism and benefits from it by causing some harm