Category 4 STAAR Review, 8th Grade Science

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Adaptation

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Process by which an animal or plant species becomes fitted to its environment to help them survive.

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Biodiversity

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Variety of life in the world or in a particular habitat or ecosystem.

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Consumer

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Organisms that eat other organisms; also known as heterotrophs.

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Biotic

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The living organisms in an ecosystem, such as plants and animals.

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Parasite

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Organisms that live in or on another organism and benefit at the host's expense.

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Natural Selection

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The process through which species adapt to their environment; survival of the fittest.

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Ecological Succession

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The process of change in the species structure of an ecological community over time.

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Interdependence

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The reliance of organisms on each other for survival and resources.

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Decomposer

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Organisms that break down dead or decaying organisms, returning nutrients to the ecosystem.

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Producer

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Organisms that produce their own food, typically through photosynthesis, such as plants.