What features cause them to be classified as gymnosperm

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Ephedra,Gnetum and Welwitschia. These three genera are the only representatives of this phylum. All three are somewhat unusual and have some characteristics such as xylem vessels resembling angiosperms. What features cause them to be classified as gymnosperm?

Reference no: EM13157166

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What features cause them to be classified as gymnosperm : Ephedra,Gnetum and Welwitschia. These three genera are the only representatives of this phylum. All three are somewhat unusual and have some characteristics such as xylem vessels resembling angiosperms. What features cause them to be classified as..

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