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13. Ecology
Relationships
| Term | Definition |
|---|---|
| Parasitism | a relationship between two species in which one species benefits from the other species, the host, which is harmed |
| Commensalism | a relationship between two organisms in which one organism benefits and the other is unaffected |
| Mutualism | a relationship between two species in which both species benefit |
| Predation | an interaction between two organisms in which one organism kills and feeds on the other organism, the prey |
| Competition | ecological relationship in which two organisms attempt to obtain the same resource |
| Symbiosis | any type of a close and long-term biological interaction between two different species |
| Niche | all of the physical, chemical, and biological factors that a species needs to survive, stay healthy, and reproduce in an ecosystem |