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| mutually dependent; depending on each other |
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| a community of organisms and their abiotic environment |
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| the study of the interactions of living organisms with one another and with their environment |
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| the part of Earth where life exists; includes all of the living organisms on Earth |
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| a group of various species that live in the same habitat and interact with each other |
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| a group of organisms of the same species that live in a specific geographical area and interbreed |
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| an environmental factor that is associated with or results from the activities of living organisms |
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| the place where an organism usually lives |
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| describes the nonliving part of the environment, including water, rocks, light, and temperature |
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| the condition of drug addiction in which greater amounts of a drug are needed to achieve the desired effect |
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| an organism's change in response to a change in the organism's environment |
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| an organism whose physiological reactions follow environmental changes |
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| a genetic unit that regulates or suppresses the activity of one or more structural genes |
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| a state in which seeds, spores, bulbs, and other reproductive organs stop growth and development and reduce their metabolism, especially respiration |
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| in general, any movement of individuals or populations from one location to another; specifically, a periodic group movement that is characteristic of a given population or species |
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| the unique position occupied by a species, both in terms of its physical use of its habitat and its function within an ecological community |
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| a species that has a broad niche such that the species can tolerate a wide range of conditions and can use a variety of resources |
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| an individual or a species that is adapted to a particular environmental factor or ecological niche and that can tolerate only a narrow range of conditions |
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