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____________________ a close, long-term relationship between two species that usually involves an exchange of food or energy.
Symbiosis
A symbiotic relationship that benefits one species but does not harm or benefit the other is ____________________.
Commensalism
A symbiotic relationship that benefits one species and harms the other is ________________.
parasitism
The species that benefits in a parasitic relationship is called the _____________.
parasite
The species that is harmed in a parasitic relationship is called the ___________.
host
A symbiotic relationship in which both partners benefit is called ______________.
mutualism
_______________________ relationships occur when organisms work together to ensure survival.
Cooperative
A relationship in which one organism eats another.
predator-prey
______________________ relationships occurs when organisms that share the same habitat compete for resources.
competitive
