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Symbiosis
A relationship in which two different species live in close association with each other in a long-term relationship
Ecosystem
All of the abiotic (non-living) and biotic (living) components of a given area
Mutualism
A relationship between two species in which both species benefit
Parasitism
A relationship between two organisms of different species where one benefits and the other is harmed. The parasite often lives inside of and using the host as an energy source, although not always.
Interspecific competition
competition between members of different species, such as lions and hyenas competing for food
Competition
A common demand by two or more organisms upon a limited supply of a resource; for example, food, water, light, space, mates, nesting sites. It may be intraspecific or interspecific.
Resource partitioning
The evolution of behavioral and physical adaptations that allow two species to reduce their competition for a shared resource
Coevolution
Process by which two species evolve in response to changes in each other. Can often result in resource partitioning or mutualistic relationships
population
A group of individuals that belong to the same species and live in the same area
community
All the different populations that live together in an area
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