| A | B |
|---|
| enviornment | all of the living and nonliving things that an organism may interact with |
| ecology | the study of the relationship and interaction of living things with one another and their environment |
| ecosystem | a unit consisting of all the living and nonliving things in a given area that interact with one another |
| community | the livivng part of the ecosystem |
| population | a group of organism of the same species living together in the same area |
| habitat | the place in which an organism lives and obtains the resources it needs to survive |
| producer | an organism that is able to make its own food by using a source of energy to turn simple raw materials into food |
| consumer | an organism that cannot make its own food |
| decomposer | an organism that breaks down the bodies of dead organisms into simpler substances |
| food chain | a representation of a series of events in which food energy and matter are transferred from one organism to another |
| food web | a diagram that consist of many overlapping food chains |
| niche | an organism's role in the environment, which includes everything the organism does and everything the organism needs in its environment |
| competition | the type of interaction in which organism struggle with one another to obtain resources |
| predator | an organism that kills and eats another organism |
| prey | an organism that is eaten by a predator |
| symbiosis | a close relationship between two organisms in which one organism lives in, on, or near another organism and at least one benefits |
| commensalism | a form of symbiosis in which one organism benefits, but the other is not harmed |
| mutualism | a form of symbiosis in which both organisms benefit |
| parasite | an organisms that lives in, or on another organism and harms the host |
| host | an organism that provides a home for another organism |
