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12 terms

Living Things Interact

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symbiosis
a close, long-term relationship between two or more species
predator
an organism that consumes another.
prey
an organism that is eaten by another.
mutualism
a relationship where both organisms benefit from each other.
commensalism
a relationship where one organism benefits and the other is not helped or hurt.
parasitism
a symbiotic relationship where one organism benefits and the other is harmed.
parasite
an organism that feeds off of another living creature, usually without killing it
host
the organism that is harmed in a parasitic relationship
competition
when two or more organisms fight for the same limited resource (food or space.)
Commensalism
A bird builds its nest in a tree where it is safe from predators. The tree is unaffected by the birds.
Parasitism
A tapeworm lives inside the digestive tract of a dog. The dog begins to lose weight over time because the tapeworm is taking away its nutrients.
Mutualism
Stinging ants live in a tree with thorns for protection. In turn, the ants protect the tree from being eaten by other animals.