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| The total organic mater in an ecosystem. |
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| A system of interacting organisms and nonliving factors in a specified area. |
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| A sequence of organisms that eat one another in an ecosystem. |
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| All the feeding relationships in an ecosystem. |
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| An organisms that eats only plants. |
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| An organisms that eats other organisms. |
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| An organisms that consumes parts of dead organisms and transfers all the biomass into simple chemicals. |
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| Functional role in a feeding relationship through which energy flows. |
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| An organism that is able to produce its own food through photosynthesis. |
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| A consumer that eat both plants and animals. |
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| A meat-eating animal; a predator |
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| Referring to a tree that bears cones. |
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| Referring to a tree that sheds all of its leaves seasonally. |
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| A scientist who studies organisms and their physical surroundings. |
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| An organism's place and function in a community. |
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| Region that receives at least 100 inches of rain per year. |
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| A treeless area between the ice cap and the tree line of Arctic regions. |
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| The process by which producers make energy-rich molecules (food) from water and carbon dioxide in the presence of light. |
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| The part of Earth and its atmosphere where life exists. |
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