unit 8 biology

2. A community of organisms where there are several interrelated food chains
4. collection of all ecosystems and biomes present on earth
5. A relationship between two organisms of different species where one benefits and the other is harmed
9. A relationship between two organisms in which one organism benefits and the other is unaffected
11. A series of steps in which organisms transfer energy by eating and being eaten
12. An organism that makes its own food
14. total amount of living tissue within a given trophic level
16. Scientific study of interactions among organisms and between organisms and their environment
18. A consumer that eats only plants.
21. All the living organisms that inhabit an environment
22. organism that feeds on plant and animal remains and other dead matter
24. An organism that breaks down wastes and dead organisms
25. physical, or nonliving, factor that shapes an ecosystem

1. Ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time
3. An organism that cannot make its own food.
6. A group of ecosystems that share similar climates and typical organisms
7. A biological community of interacting organisms and their physical environment.
8. An organism's particular role in an ecosystem, or how it makes its living
10. A group of individuals that belong to the same species and live in the same area
13. Place where an organism lives
15. An animal that eats both plants and animals
17. A consumer that eats only animals.
19. diagram that shows the relative amounts of energy or matter within each trophic level in a food chain or food web
20. A relationship between two species in which both species benefit
23. All the different populations that live together in an area