| A | B |
|---|
| Environment | All of the living and nonliving things with which an organism will interact |
| Ecology | The study of the relationship and interactions 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 living part of an ecosystem. |
| Population | A group of organisms 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 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 consists of many overlapping food chains. |
| Niche | An organism's role in a ecosystem which includes everything an organism does and needs in an environment. |
| Competition | The type of interaction in which organisms 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 near, on, or even inside another organism and in which at least one organism benefits. |
| Commensalism | A form of Symbiosis in which one organism benefits and the other is not harmed. |
| Mutualism | A form of Symbiosis in which both organisms benefit. |
| Parasitism | A form of Symbiosis in which one organism benefits and the other is harmed. |
| Parasite | An organism that lives on or inside the body of a host organism and harms the host. |
| Host | An organism that provides a home for another organism. |
