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| the zone around the earth where living things are found |
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| ecological system encompassing a bilological community and the physical enviroment associated with it |
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| all the different species that live together in a habitat |
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| group of individual organisms that belong to the same species, live in the same area, and breed withing the group |
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| enviroment in which an organism lives |
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| the role of a species within an ecosystem |
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| global warming caused by heat-trapping gases such as carbon dioxide, methane, and water vapor |
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| regular progression of species replacement that occurs over a period of time |
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| living organisms that make up an ecosystem |
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| the non-living physical components of an ecosystem |
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| the process by which unrelated species develop similiar structures as a response to a smiliar habitat |
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| the idea that one or more different species developed over time from a common ancestor |
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| any change in the structure, function, or behavior of an organism that makes it better suited to live in its enviroment |
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| relationship between two organisms in which both organisms benefit |
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| a symbiotic relationship in which one species benefits and the other is neither harmed nor helped |
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| substance used to kill bacteria |
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| strand of DNA encased in a protein coat that infects living cells and utilizes the cell's parts to make copies of itself |
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| symbiotic relationship in which organisms live, grow, feed, and take shelter inside or on another organism |
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| idea that states that organisms change over time, forming new species from pre-existing ones |
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| ecological interaction in which one or more species live together in a close long-term association |
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| preserved or mineralized remains or traces of an organism that lived long ago |
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| group of similar organisms that are capable of producing fertile offspring in nature |
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| the dry weight of tissue and other organic matter in a given unit area |
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| the existence of a variety of species in ecosystems |
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| substances prepared from killed or weakened pathogens and introduced into an organism to produce immunity |
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| used by the body to destroy disease-causing agents called pathogens |
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