Gnetum is considered closer to angiosperms than Cycas and Pinus because of

Question

Gnetum is considered closer to angiosperms than Cycas and Pinus because of (A) presence of perianth and two integuments (B) post fertilization development of endosperm (C) absence of resin duct and leaf venation (D) presence of vessel elements and absence of archegonia

Tardigrade Admin · Accepted Answer

Unlike Cycas and Pinus and most other gymnosperms Gnetum shows the occurrence of vessel elements and the absence of archegonia. Archegonia are altogether absent in the female gametophyte and vessels occur in the xylem along with the tracheids in the secondary wood. Thus, Gnetum shows affinities with angiosperms. Besides, it resembles angiosperms in several other aspects like free nuclear divisions in the embryo sac, two cotyledonous embryo, etc.

Q. Gnetum is considered closer to angiosperms than Cycas and Pinus because of

presence of perianth and two integuments

post fertilization development of endosperm

absence of resin duct and leaf venation

presence of vessel elements and absence of archegonia