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Definition
| all the members of one species in one particular area |
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| a group of organisms that are physically similar and can mate and reproduce |
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Definition
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Definition
| a close relationship between two species that benefits at least on of the species |
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Definition
| the role of an organism in its habitat |
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Definition
| the struggle between organisms to survive as they attempt to use the same limited resource |
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Definition
| a living part in an organisms habitat |
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Definition
| a nonliving part in an organisms habitat |
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Definition
| the series of changes that occur in a place where no soil or organisms exist |
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Definition
| 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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Definition
| an interaction where one organism kills another for food |
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Definition
| a relationship where one organism lives on or in side another organism and harms it |
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Definition
| a relationship between two species in which both species benefit |
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Definition
| a relationship between two species in which one species benefits and the other is neither helped nor harmed |
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Term
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Definition
| an environmental factor which causes a population to decrease |
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