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Biotic factors
all the living members of an ecosystem
abiotic factors
resources that are competed for by living things
oxygen
O2 - 21%
Nitrogen
N - 78%
Carbon Dioxide
CO2 - less than 1 %
Argon
Ar - less than 1 %
organism
a single living thing
Population
two or more of the same organism
community
two or more populations of organisms
ecosystem
two or more populations or organisms PLUS abiotics
Plant abiotics
air, water, sun, nutrients, space, temperature