The scientific discipline in which the relationships among living organisms and the interaction the organisms have with their environments are studied.
The portion of Earth that supports life
The living factors in an organism's environment.
The nonliving factors in an organism's environment.
Individual organisms of a single species that share the same geographic location at the same time.
Group of organisms that can interbreed and produce fertile offspring in nature.
Group of interacting populations that occupy the same geographic area at the same time.
A biological community and all of the abiotic factors that affect it.
A large group of ecosystems that share the same climate and have similar types of communities.
An area where an organism lives.
The role or position that an organism has in its environment.
Describes how an organism meets its needs for food, shelter, and reproduction.
Occurs when more than one organism uses a resource at the same time.
The act of one organism pursuing and consuming another organism for food.
The organism that pursues another organism for food.
The close relationship that exists when two or more species live together.
The relationship between two or more organisms that live closely together and benefit from each other.
relationship in which one organism benefits at the expense of another organism
relationship in which one organism benefits and the other organism is neither helped nor harmed
Levels of Organization from smallest to greatest
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