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11 Terms

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autotroph

organism that produces its own food

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primary producer

organisms that can create their own food using photo or chemosynthesis

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photosynthesis

the process in which plants use sunlight to create their own food

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heterotroph

organisms that gain energy + nutrients by consuming other organisms

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consumer

organisms that gain energy by eating other organisms

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food web

network of chains within an ecosystem

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trophic level

indicator of an organism’s position within a food chain

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ecological pyramid

diagram that shows distribution of energy in an ecosystem

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biomass

total quantity of living organisms in an ecosystem

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phytoplankton

microscopic marine algae

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detritus

non-living organic matter