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Chapter 1

TermDefinition
organism a living thing.
habitat an environment that provides the things a specific organism needs to live, grow, and reproduce.
biotic factor a living or once living part of an organism's habitat.
abiotic factor a non living part of an organism's habitat.
species a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.
population all the members of one species living in the same area.
community all the different populations that live together in a particular area.
ecosystem the community of organisms that live in a particular area, a long with their non living environment.
ecology the study of how organisms interact with each other and their environment.
birth rate the number of births per 1,000 individuals for a certain time period.
death rate the number of deaths per 1,000 individuals for a certain time period.
immigration movement of individuals into an population's area.
emigration movement of individuals out of a population's area.
population density the number of individuals in an area of a specific size.
limiting factor an environmental factor that causes a population to decrease in size.
carrying capacity the largest population that a particular environment can support
natural selection the process by which organisms that are best adapted to their environment are most likely to survive and reproduce.
adaptation an inherited behavior or physical characteristic that helps an organism survive and reproduce in it's environment.
niche how an organism makes its living and interacts with the biotic and abiotic factors in its habitat.
competition the struggle between organisms to survive as they attempt to use the same limited resources in the same place at the time.
predation an interaction in which one organism kills another for food or nutrients.
predator the organism that does the killing in a predation interaction.
prey an organism that is killed and eaten by another organism in a predation interaction.
symbiosis any relationship in which two species live closely together and that benefits at least one of the species.
mutualism a type of symbiosis in which both species
commensalism
parisitism
parasite
host
Created by: user-1975254
 

 



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