13 terms

Ecology: Section 3; Interactions Among Living Things

STUDY
PLAY
natural selection
A process in which a characteristic that makes an individual better suited to its environment may eventually become common in that species.
adaptations
the behaviors and physical characteristics that allow organisms to live successfully in their environments.
niche
The role of an organism in its habitat, or how it makes its living.
competition
the struggle between organisms to survive as they attempt to use the same limited resource.
predation
An interaction between species in which one species, the predator, eats the other, the prey
predator
An animal that naturally preys on others
prey
Animal hunted or caught for food
symbiosis
A close relationship between two species that benefits at least one of the species.
mutualism
A relationship between two species in which both species benefit
commensalism
A relationship between two organisms in which one organism benefits and the other is unaffected
parasitism
A relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed
host
An organism on which a parasite lives.
parasite
An organism that lives on or in a host and causes harm to the host