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33 Cards in this Set
- Front
- Back
organism |
a living thing |
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habitat |
an environment that provides the things a specific organism needs to live, grow, and reproduce. |
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biotic factors |
a living or once living part of an organism's habitat |
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abiotic factors |
a nonliving part of an organism's habitat. |
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species |
a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce. |
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population |
all the members of one species living in the same area. |
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community |
all the different populations that live together in a particular area. |
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ecosystem |
the community of organisms that live in a particular area along with their nonliving things. |
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ecology |
the study of how organisms interact with each other and their environment |
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death rate |
the number of deaths per 1,000 individuals for a certain time period. |
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birth rate |
the number of births per 1,000 individuals for a certain time period. |
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immigration |
movement of individuals into a population's area. |
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emmigration |
movement of individuals out of a population's area. |
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population density |
the number of individuals in an area of a specific size. |
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limiting factor |
an environmental factor that causes a population to decrease in size. |
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carrying capacity |
the largest population that a particular environment can support |
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natural selection |
the process by which organism that are best adapted to their environment are most likely to survive. |
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adaptations |
an inherited behavior or physical characteristic that helps an organism survive. |
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niche |
how an organism makes its living and interacts with the biotic and abiotic factors in its habitat. |
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competition |
the struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time. |
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predation |
an interaction in which one organism kills another for food or nutrition. |
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predator |
the organism that does the killing in a predation interaction |
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prey |
an organism that is killed and eaten by another organism in a predation interaction. |
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symbiosis |
any relationship in which two species lie closely together and that benefits at least one of the species. |
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mutualism |
a type of symbiosis in which both species benefit from living together. |
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commensalism |
a type of symbiosis between two species in which one species benefits and the other species in neither helped nor harmed. |
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parasitism |
a type of symbiosis in which one organism lives with, on, or in a host and harms it. |
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parasite |
an organism that benefits by living with, on, or in a post in a parasitism interaction. |
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host |
an organism that a parasite lives with, in, or on, and which provides a source of energy to a suitable environment for the parasite to live. |
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succession |
the series of predictable changes that occur in a community over time. |
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primary succession |
the series of changes that occur in an area where no soil or organisms exist. |
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pioneer species |
the first species to populate an area during succession. |
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secondary succession |
the series of changes that occur in an area where the ecosystem has been disturbed but where soil and organisms still exist. |