Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms.

Absence of resin duct and leaf venation

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Presence of vessel elements and absence of archegonia

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Perianth and two integuments

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Embryo development and apical meristem

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Solution

The correct option is B
Presence of vessel elements and absence of archegonia

Gnetum is a genus of gymnosperms, the sole genus in the family Gnetaceae and order Gnetales. They are tropical evergreen trees, shrubs and lianas. Unlike other gymnosperms they possess vessel elements in the xylem.

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