What is a parasite?

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Parasites

-A parasite is an organism that benefits from a close prolonged relationship with its host, which is harmed.
The parasite grows, feeds, or uses shelter of the host organism (including the host itself) contributing negatively to the relationship.

-A parasite is an organism that has a deleterious symbiotic relationship with another organism or host species. The parasite usually lives on or in the host and needs the host for energy and nutrients to survive. A flea or tick is a parasite. Bacteria can be parasitic. Mistletoe is a parasite. Parasites sometimes cause the eventual death of the host although not always, and this can lead to the parasites demise if it cannot leave or find a new host. On a humorous note I like to think of lawyers as parasites.

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