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2. a relationship where both organisms benefit
7. nonliving parts of an environment that affects living organisms and the functioning of environment
8. a cold subartic region characterized by vast dense forests located south of artic circle
9. organism that cannot produce its own food and must consume other organisms
12. multiple organisms use a resource at the same time
14. a community with 4 seasons and moderate rainfall
15. an organism that obtains energy by eating other organisms or organic matter
16. an organism that creates its own food using photosynthesis or chemosynthesis
19. biome that is hot humid and wet near equator that stays warm
20. large open ecosystem dominated by grasses

1. one organism benefits one is neither helped nor harmed
3. a relationship between two or more species that live together
4. vast cold treeless biome that is found in artic or on tall mountains
5. the living components of ecosystem that affect or shape their environment
6. one organism benefits and one is harmed
10. organism that produces its own food
11. a group of ecosystems
13. organism that breaks down dead plants animals and waste products into inorganic nutrients
17. tropical grassland biome characterized by continuous covers of grass dotted with shrubs and trees
18. ecosystem defined by extreme aridity recieves less than 30 cm of precipitation per year