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Chpt. 3: Lesson 2
Ecosystems
Term | Definition |
---|---|
predator | a consumer that hunts and eats another animal |
prey | any animal that is hunted by others for food |
producer | organism that makes its own food for energy |
consumer | organism that cannot make its own food |
decomposer | organism that gets its energy by breaking down wastes and dead organisms |
food chain | a series of steps by which energy moves from one type of living thing to another |
food web | a diagram that combines many food chains into one picture |
photosynthesis | the process in which producers use carbon dioxide, water, and sunlight to produce oxygen and sugar. |
symbiosis | a relationship between two organisms of a different species that benefits at least one of the organisms |
parasitism | a relationship in which one of the organisms lives on or in a host and harms it |
commensalism | a relationship between two species in which one benefits and the other is neither helped nor harmed |
mutualism | a relationship in which both species benefit |