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18.3
| Question | Answer |
|---|---|
| producer | an organism that can make organic molecules from inorganic molecules; a photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem |
| chemosynthesis | the process in which bacteria us energy stored in inorganic molecules to produce carbohydrates |
| gross primary productivity | the rate at which producers in an ecosystem capture the energy of sunlight by producing organic compounds |
| biomass | the organic material that has been produced in an ecosystem |
| net primary productivity | the rate at which biomass accumulates |
| consumers | they obtain energy by consuming organic molecules made by other organisms |
| herbivores | eat producers |
| carnivores | eat other consumers |
| omnivores | eat both producers and consumers |
| detritivores | consumers that feed on the garbage of an ecosystem |
| decomposers | detritivores that cause decay by breaking down complex molecules into simpler molecules |
| trophic level | indicates the organisms position in a sequence of energy transfers |
| food chain | a single pathway of feeding relationships among organisms in an ecosystems that results in energy transfer |
| food web | interrelated food chains in an ecosystem |
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gbadger24
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