unit 8

4. organisms that obtains their energy by only eating plants
5. a collection of all the food chains in ecosystems
7. close relationship between 2 species in which 1 benefits and the other is not affected
10. organism that breaks down organic matter into it's chemical componets to be recycled and used again
11. organism that obtains energy by eating only other animals
12. a collection of all the ecosystems and biomes present on earth
14. organism that obtains energy by eating plant and animal remains or other dead matter
17. all the organisms that live in a particular area and their nonliving environment
18. physical or nonliving factors that shape ecosystems
19. diagram that shows the relative amounts of biomass, energy, or number of individuals contained within each trophic levelof a food chain
20. organism that relies on other organisms for its energy and food supply

1. the natural home or environment of an animal,plant,or other organisms
2. series of steps that show a single pathway of matter and energy from producer to top consumer
3. the biological influences or living factors that impact an organism within an ecosystem
6. states that no 2 organisms can occupy the same niche in the same habitat at the same time
8. the total amount of living tissue within a given trophic level
9. organism that uses energy from their environment to create their own food
13. group of ecosystems with the same climate and similar dominant or climax communities
15. the study of interactions among organisms and their environment
16. group of populations that live together in the same place at the same time