This member of Gnetophyta lives in the Namib desert, with most of the plant underground, two leathery leaves, and can live over 1000 years. This plant is likely which of the following? O None of the above is correct O Ephedra O an undescribed cycad O Welwitschia Gnetum

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Parasitic infections

A parasite is an organism that lives in the body of another organism and obtains food at the expense of the host. There are two kinds of parasites they are internal and external. An internal parasite lives inside another organism and is known as endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite.