An environment that provides the things an organism needs to live, grow and reproduce
A living part of an organism's habitat
The process in which organisms use water along with sunlight and carbon dioxide to make their own food
A group of organisms that are physically similar and can mate with each other
All the different populations that live together in a particular area
The community of organisms that live in a particular area
The study of how living things interact with each other and their environment
The number of births in a population in a certain amount of time
the largest population that an area can support
The number of deaths in a population in a certain amount of time
Leaving a population
Moving to a population
An environmental factor that causes a population to decrease
The number of individuals in an area of a specific size
A behavior or physical characteristic that allows an organism to live successfully in its environment
A relationship between two species in which one species benefits and the other in neither helped nor harmed
The struggle between organisms to survive as they attempt to use the same limited resource
The organism that a parasite lives in or on in a parasitism interaction
A relationship between two species in which both species benefit
A process by which characteristics that make an individual better suited to its environment become more common in a species
The role of an organism in its habitat, or how it makes its living
The organism that benefits by living on or in a host in a parasitism interaction
A relationship in which one organism lives on or in a host and harms it
An interaction in which one organism kills another for food
The organism that does the killing in a predation interaction
An organism that is killed and eaten by another organism
A close relationship between two species that benefits ar least one of the species
The first species to populate an area
The series of changes that occur in an area where no soil or organisms exist
The series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms still exist
The series of predictable changes that occur in a community over time
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