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Living Things
Key Words Ch.1 Sec.3
Question | Answer |
---|---|
natural selection | a characteristic that makes an individual better suited to its environment |
adaptations | the behaviors and physical characteristics that allow organisms to live successfully in their environment |
niche | an organisms role in its habitat |
competition | the struggle between organisms to survive as they attempt to use the same limited resource |
predation | interaction in which one organism kills another for food |
predator | the organism that does the killing |
prey | the organism that is killed |
symbiosis | a close relationship between two species that benefits at least one of the species |
mutualism | a relationship in which both species benefit |
commensalism | a relationship where one species benefits, and the other species isn't helped or harmed |
parasitism | involves one organism living inside another and harming it. one benefits, and one is harmed |
parasite | the organism that BENEFITS in the parasitism relationship |
host | the organism that the parasite lives in or on and is HARMED |