| A | B |
|---|
| habitat | the place where an organism lives out its life |
| scavengers | organisms that eat animals that are already dead |
| niche | the role an species has in its environment |
| ecology | the study of interactions among organisms and their environments |
| population | a group of organisms of one species that mate with one another & produce fertile offspring |
| autotroph | use energy from the sun or energy store in chemical compounds to make their own food |
| biosphere | the portion of the earth that supports life |
| community | a group of populations that interact with one another |
| heterotroph | an organism that feed upon other organisms |
| parasitism | a relationship between two organisms in which one organism benefits while the other organism is harmed |
| decomposer | breaks down and absorbs nutrients from dead organisms |
| abiotic factors | the nonliving parts of an organism's environment |
| biotic factors | the living parts of an organism's environment |
