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a single organism in an environment


organisms of the same kind living in the same environment


all the populations of organisms living together in an environment


part of the environment and its physical environment


populations live in a certain part of an ecosystem


the role of a population


captures energy from the sun and stores it in tissue, and passes it on to other organisms.
example: plants


an organism that obtains energy and nutrients by feeding on other organisms or their remains.
example: all animals

food chain

show how organisms are related to one another according to what they eat

food web

relationships between food chains


long-term relationship between different kinds of organisms


having a population that is so small that it is likely to disappear

learned behaviors

behaviors animals are taught or acquire after birth


due to limited resources, there is this among organisms


behavior that an organism inherits

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