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| an environment that produces the things an organism needs to live, grow, and reproduce. |
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| A living part of an organism's habitat |
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| A non-living part of an organism's habitat |
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| A group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce |
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| All the members of one species in a particular area |
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| all the different populations that live together in an area |
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| the community of organisms that live in a particulararea, along with their nonliving surroundings |
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| The number of births in a population in a certain amount of time |
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| The number of deaths in a population in a certain amount of time |
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| An environmental factor that causes a population to decrease |
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| The largest population that an area can support |
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| A process by which characteristics that make an individual better suited to its environmentbecame more common in a species |
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| A behavior physical characteristic that allows an organism to live successfully in its environment |
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| The role of an organism in its habitat or how it makes its living |
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| The struggle between organisms to survive as they attempt to use the same limited resource |
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| An interaction in which one organism kills another for food |
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| A close relationship between two species that benefits at least one of the species |
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| A relationship between two species in which both species benefit |
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| A relationship between two species in which one species benefits and the other is neither helped nor harmed |
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| A relationship in which one organism lives on or in a host and harms it. |
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| The series of changes that occur in an area where no soil or organisms exist |
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| The series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms still exist |
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