is the number of offspring produced over a given time period

is the number of individuals that die over the same time period

is a species that has died out and no individual

is a species whose population is at risk of extinction

a species at risk, but not yet endangered

is the instinctive seasonal movement of a population of organisms from one place to another

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CH 21

vocabulary 2

Term	Definition
birthrate	is the number of offspring produced over a given time period
death rate	is the number of individuals that die over the same time period
extinct species	is a species that has died out and no individual
endangered species	is a species whose population is at risk of extinction
threatened species	a species at risk, but not yet endangered
migration	is the instinctive seasonal movement of a population of organisms from one place to another