Ch.18 vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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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
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chemosynthesis | the production of carbohydrates through the use of energy from inorganic molecules instead of light
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gross primary productivity | the rate at which organic matter is assimilated by plants and other producers during a period of time over a certain area
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biomass | plant material, manure, or any other organic matter that is used as an energy source
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net primary productivity | the rate at which biomass accumulates in an ecosystem
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consumer | an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources
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herbivore | an organism that eats only plants
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carnivore | an organism that eats animals
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omnivore | an organism that eats both plants and animals
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detritivore | a consumer that feeds on dead plants and animals
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decomposer | an organism that feeds by breaking down organic matter from dead organisms; examples include bacteria and fungi
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trophic level | one of the steps in a food chain or food pyramid; examples include producers and primary, secondary, and tertiary consumers
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food chain | the pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms
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food web | a diagram that shows the feeding relationships between organisms in an ecosystem
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