Unit #1 Review A

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Heterotroph

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An organism that relies on other organisms for food.

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Ecology

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The study of interactions between organisms and their environment.

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Niche

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The unique position that a species has in the physical use of its habitat and in its function (job) within an ecosystem.

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Ecosystem

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All the organisms in a particular location, including their nonliving environment.

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Producer

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An organism that makes its own food by using sunlight or chemicals; also known as autotroph.

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Consumer

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An organism that obtains energy by feeding on other organisms.

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Decomposer

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An organism that breaks down dead or decaying organisms, returning nutrients to the ecosystem.

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Biotic Factors

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Living components of an ecosystem, such as plants, animals, and microorganisms.

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Abiotic Factors

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Non-living components of an ecosystem, such as sunlight, water, and minerals.

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Population

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A group of individuals of the same species living in a specific area.