In which features does Gnetum differ from Cycas and Pinus showing affinities with angiosperms?

Perianth and two integuments

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Embryo development and apical meristem

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Absence of resin ducts and leaf venation

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Presence of vessel elements and absence of archegonia

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Solution

The correct option is C Presence of vessel elements and absence of archegonia
Angiosperms have vessel elements in xylem. Order Gnetum has vessel elements in xylem which is characteristics of angiosperms. Whereas Cycas and Pinus lack vessel elements. Archegonia is absent in Gnetum whereas present in Cycas and Pinus.
Thus, the correct answer is option D.

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