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Unit 5 Vocab
3/29/18 vocab!!
Term | Definition |
---|---|
Extinct (Species) | Species that no longer exists. |
Biodiversity | Variety of living organisms on Earth. |
Symbiosis | Relationship in which organisms live closely together over a long period of time. |
Parasitism | Relationship in which one species, the parasite, feeds on a second organism, the host. |
Mutualism | Symbiotic relationship in which both species benefit |
Commensalism | Relationship in which one organism benefits while the other is not affected |
Adaptation | Special, inherited characteristic that helps an organism better survive in its environment and which is developed over time. |
Structural Adaptation | Physical characteristic that helps an organism survive in its environment. |
Behavioral Adaptation | Way in which an organism acts or responds to its environment in order to survive |
Mimicry | Adaptation in which one species copies the appearance or behavior of another species |
Reflex | Behavior that is triggered automatically by something outside an organism. |
Instinct | Behavior that an organism carries out because it is genetically prone to do so. |
Natural Selection | Process that makes it more likely that organisms with the best characteristics for survival |
Endangered Species | Species that has so few individuals remaining that extinction is a possibility in the near future |
Threatened Species | Species whose numbers are dwindling to a point at which the species could become endangered |