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30 Cards in this Set
- Front
- Back
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Organism
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A living thing
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habitat
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An environment that provides the thigs an organsim needs to live, grow, and reproduce
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Biotic Factor
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A living part of an organism's habitat
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Abiotic Factor
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A nonliving part of an organism's habitat
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Species
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A group of similar organisms that can produce offspring
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Population
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All the members of one species in a particular area
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Community
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All the different populations that live together in an area
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Ecosystem
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All the living and nonliving things that interact in an area
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Ecology
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Study of how living things interact with each other and their environment
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Estimate
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An approximation of a number
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Birth Rate
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The number of births in a populationin a certain amount of time
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Death Rate
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the number of deaths in a population in a certain amount of time
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emigration
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leaving a population
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Immigration
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Moving into a population
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Population Density
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The number of individuals in a specific area
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Limiting Factor
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An environmental factor that causes population to decrease
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Carrying Capacity
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The largest population that an area can support
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Natural Selection
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A process by which characteristics that make an individual better suited to its environment become more common in a species.
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Adaptation
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A behavior or physical characteristic that allows an organism to live succesfully in its environment
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niche
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An organism's particular role in an ecosystem
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Competition
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Struggle between organisms for limited resources in a habitat
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Predation
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Interaction in which one organism kills and eats another
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Predator
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Organism that does the killing in predation
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Prey
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Organism that is killed in predation
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Symbiosis
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Relationship in which at least one species benefits
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Mutualism
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A relationship between two species in which both species benefit
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Commensalism
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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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parasitism
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A relationship in which one organism lives on or in a host and harms it
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Parasite
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Organism that benefits in paratism
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Host
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Organism that is harmed in paratism
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