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organism

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A living thing.

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habitat

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An environment that provides the things a specific organism needs to live, grow, and reproduce.

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biotic factor

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The parts of a habitat that are or were once alive and that interact with an organism.

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abiotic factor

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the non-living things that are a part of an organism's habitat.

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population

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All members of one species living in a particular area.

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community

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All the different populations that live together in an area.

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ecosystem

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The community of organisms that lives in a particular area, along with the nonliving things.

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limiting factor

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An environmental factor that causes a population to stop growing or to decrease in size.

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producer

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An organism that can make its own food.

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consumer

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An organism that can't make its own food and obtains energy by feeding on other organisms.