ECOLOGY

2. the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms.
4. a model of interconnected food chains that illustrates the flow of energy and nutrients through an ecosystem
5. something that makes their own food such as a plant.
6. a linear, simplified model showing the flow of energy and nutrients through an ecosystem, where each organism in the sequence feeds on the one before it
9. the vital process where autotrophic organisms the vital process where autotrophic organisms
11. any living organism that obtains energy by feeding on other organisms, rather than producing its own food
12. the living components of an ecosystem or anything that was once alive, such as plants, animals, fungi, and bacteria

1. the non-living components of an ecosystem that influence living organisms
3. the scientific study of the relationships between living organisms an their environment.
7. a group of people living in the same place or having a particular characteristic in common.
8. the total number of individuals in an area.
10. a biological community of interacting organisms and their physical environment.