ecology

3. An organism that eats only plants
9. each of several hierarchical levels in an ecosystem
11. An organism that eats only animals
12. a biological community of interacting organisms and their physical environment.
14. a nonliving part of an ecosystem that shapes its environment
15. the branch of ecology that works to understand the patterns and processes of change over time or space for populations of a single species.
16. a system of interlocking and interdependent food chains.
17. an animal that naturally preys on others
19. a larger organism that harbors a smaller organism
21. an individual animal, plant, or single-celled life form.
22. an organism deriving its nutritional requirements from complex organic substances.

1. organisms that consume other organisms to obtain their energy
2. organisms that can make their food
3. the natural home or environment of an animal, plant, or other organism.
4. an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
5. an organism that is able to form nutritional organic substances from simple inorganic substances
6. A animal that is hunted or killed for food
7. study of the organization and functioning of communities
8. a hierarchical series of organisms each dependent on the next as a source of food.
10. the living components that shape up the environment.
13. an animal that feeds on carrion, dead plant material, or refuse.
15. the relationship between different species in which one organism lives on or in the other organism and benefits from it by causing some harm
18. branch of biology that deals with the relations of orgnaisms
20. the region on, above, and below the Earth's surface where life exists.
21. an organism that eats plants and animals