Organisms and Their Relationships

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The close relationship that exists when two or more species live together.

Describes how an organism meets its needs for food, shelter, and reproduction.

Levels of Organization from smallest to greatest

The scientific discipline in which the relationships among living organisms and the interaction the organisms have with their environments are studied.

The nonliving factors in an organism's environment.

The organism that pursues another organism for food.

Occurs when more than one organism uses a resource at the same time.

relationship in which one organism benefits at the expense of another organism