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Population and communities

organism a living thing
habitat an environment that provides the things the organism needs to live,grow and reproduce
biotic factors a living part in an organism's habitat
abiotic factors a nonliving thing part of an organism's habitat
photosynthesis the process in which organisms use water, along with sunlight and carbon dioxide to make their own food
species a group that are physically similar and can mate with each other and produce offspring that can also mate and reproduce
population all the members of one species in a particular area
community all the different populations that live together in an area
Ecosystem The community of organisms that live in a particular area along with their nonliving surrounding.
Ecology The study of how living things interact with e ach other and their environment
estimate An appoximation of a number based on reasonable assumptions
birth rate the number of births in a population in a certain amount of time in a certain area
death rate the number of deaths in a population in a certain amount of time ina cerain area
immigration moving into a population
emmigration leaving a population
population density the number of individuals in an area of specific size
limiting factor an environmental factor that causes a population to decrease
carring capacity the largest population that an area can support
natural selection A process by which characteristics that make an individual better suited to its environment become common in a species
adaption the behavior and physical characteristics the allow organisms to live sucessfuly in their envirenment
niche the role of an organism in its habitat or how it makes its living
compitition the struggle between organisms to survive as they attempt to use the same limited sorce
predation an interaction which on organism kills another organism for food
predator the organism that does the killing in a predition interaction
prey an organism that is killed and eaten by anther organism
symbosis a close relationship between two species that benefits at least one of the species
mutualism The relationship between two species in which both species benefit.
commensalism A relationship between two species in which one species benefits and the other is neither helped or harmed
parasitism A relationship in which one organism lives on or in a host and harms it.
parasite The organism that benefits by living on or in a host in a parasitism interaction
host The organism that a parasite lives in or on in a parasitism interaction
Created by: rnagel