all the organisms of the same species living together

all populations of all species living together

the place where an organism lives

anything that restricts the number of individuals of a population

the largest number of individuals of a species that an ecosystem can support

the demand for resources such as food, water, and shelter

The size of a population compared to the amount of space available

The potential growth of a population if it could grow in perfect conditions with no limiting factors

the number of offspring produced over a given time period

the number of individuals that die over a given time period

a species that has died out and no individuals are left

a species whose population is at risk of extinction

a species at risk, but not endangered

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

a place within an ecosystem where an organism lives

what a species does in its habitat to live

organisms that get energy from the environment

organisms that get energy by eating other organisms

a close long term relationship between two species

a symbiotic relationship in which both partners benefit

a symbiotic relationship that benefits one species but does not harm or benefits the other

a symbiotic relationship that benefits one species and harms the other