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GCSE Biology · key term
An organism that lives in or on an organism of another species and gains resources from it, harming that organism.
Used by Edexcel
Specification 9.4 · Paper 2
Revise: Parasitism and MutualismIn parasitism, a parasite lives in or on an organism of another species, called its host. The parasite obtains resources needed for survival or reproduction, but the host is harmed.
For parasitism, explain both sides: the parasite gains a resource while the host is harmed.
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