| A | B |
| ecology | interaction of organisms and their environment |
| biotic factor | living parts of an ecosystem |
| abiotic factor | nonliving parts of an ecosystem |
| environment | living and nonling portions combined |
| biosphere | area of life |
| organism | a single living thing |
| community | combinations of all living organisms in a specific area |
| population | group of organisms that interbreed |
| ecosystems | entire planet and all the living and non living parts |
| herbivore | plant eater |
| carnivore | meat eater |
| omnivore | eats both plants and animals |
| predator | hunts other organisms |
| prey | the hunted |
| producer | utilizes light for photosynthesizing |
| consumer | eats another living organism |
| parasitism | lives on or in another living thing at the expense of the other organism |
| mutualism | both organisms benefit from the relationship |
| decomposer | breaks down dead organisms |
| scavenger | eats an organism it did not kill |