Natural selection
vocabulary
natural selection-a process through which a characteristic that make and individual better suited to a specific environment may eventually become common in that species.
adaptation-the behaviors and physical characteristics that allow organisms to live successfully in their environment.
niche-the role of an organism in its habitat.
competition-the struggle between organisms to survive as they attempt to use the same limited resources.
example:An example of competition is 2 types of sharks fighting over fish.
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Predation
vocabulary
predation-an interactions which one organism kills another for food or nutrients.
predator-the organism that does the killing
prey-the organism that is killed
example:An example of a predator is a lion.
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Symbiosis
Vocabulary
symbiosis-is any relationship in which 2 species live closely together and at one of the species benefit.
commensalism-is a relationship in which one of the species benefits and the other species is neither helped nor harmed.
mutualism-a relationship in both species are benefits.
parasitism-a relationship that involves one organism living with, on or inside another organism.
parasite-the organism that benefits on another organism
host-the organism that the parasite lives on
example:an example of a parasite is a tick.
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