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1.3 Ecology

TermDefinition
niche the role of an organism in its habitat
symbiosis a close relationship between two species in which at least one benefits
prey organism that is killed and eaten
parasitism a relationship in which one species lives on or in another organism and benefits and the other species is harmed
predation when one organism kills another for food
natural selection the process by which organisms that are better adapted to their environment survive and reproduce
host an organism that is harmed by another organism living on it or in it
predator organism that kills another for food
competition the struggle to survive over limited resources
commensalism a relationship in which one species benefits and the other is not affected
parasitism an organism that lives on or in another organism and harms it
mutualism a relationship in which both organisms benefit
adaptations behaviors or physical characteristics that make an organism better able to survive
Created by: j_warren