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Biology Ch. 18Sect 3
Word and definitions of Biology chapter 18 section 3
| Question | Answer |
|---|---|
| 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. | Producer |
| The production of carbohydrates through the use of energy from inorganic molecules instead of light. | Chemosynthesis |
| The rate at which organic matter is assimilated by plants and other producers during a period of time over a certain area. | Gross Primary Productivity |
| Plant material, manure, or any other organic mater that is used as an energy source. | Biomass |
| The rate at which biomass accumulates in an ecosystem. | Net Primary Productivity |
| An organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources. | Consumer |
| An organism that eats only plants. | Herbivore |
| An organism that eats animals. | Carnivore |
| An organism that eats both plants and animals. | Omnivore |
| A consumer that feeds on dead plants and animals. | Detritivore |
| An organism that feds by breaking down organic matter from dead organisms; examples include bacteria and fungi. | Decomposer |
| One of the steps in a food chain or food pyramid; examples include producers and primary, secondary, and tertiary consumers. | Trophic Level |
| The pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms. | Food Chain |
| A diagram that shows the feeding relationships between organisms in an ecosystem. | Food Web |