Biology Unit 8

2. organism that obtains energy by eating both plants and animals
4. A group of ecosystems that share similar climates and typical organisms
8. A substance in the environment that is useful to people, is economically and technologically feasible to access, and is socially acceptable to use.
9. A relationship between two species in which both species benefit
10. a relationship in which one organism benefits and the other organism is not harmed
13. the rule in ecology that states that no two species can occupy the same niche in the same habitat at the same time
14. physical, or nonliving, factor that shapes an ecosystem
15. An organism that makes its own food
16. Succession following a disturbance that destroys a community without destroying the soil
18. A group of similar organisms that can breed and produce fertile offspring.
20. the variety of life in the world or in a particular habitat or ecosystem.
21. Any living part of the environment with which an organism might interact

1. feed on plant and animal remains and other dead matter
3. Classification system in which each species is assigned a two-part scientific name
5. An organism's particular role in an ecosystem, or how it makes its living.
6. Place where an organism lives
7. Organisms that break down the dead remains of other organisms
11. An organism that obtains energy and nutrients by feeding on other organisms or their remains.
12. An ecological succession that begins in an area where no biotic community previously existed
17. A relationship in which two different organisms live in close association with each other
19. Scientific study of interactions among organisms and between organisms and their environment