a group of living things that are so closely related that they can breed with one another and produce offspring that can breed as well

a group of organisms of the same species that live in the same area

the role a living thing plays in its habitat

the physical location where a species lives

all the populations that live and interact with each other in a particular place

the struggle between individuals or different populations for a limited resource

an interaction in which organisms work in a way that benefits all

nteraction between individuals from two different species that live closely together

an interaction between two species where both species benefit

an interaction between two species where one is benefited and the either is neither helped nor harmed

an interaction between two species where one is benefited and the either is harmed

an animal that eats another

An animal that is eaten by a predator

an individual living thing, made up of one or many cells, that is capable of growing and reproducing

any factor or condition that limits the growth of a population in an ecosystem

when a population reaches a state where it can no longer grow

the gradual change in an ecosystem in which one community is replaced by another

the first living things to move into a barren environment

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