Q. Select one of the following of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms
A) Embryo development and apical meristem
B) Absence of resin duct and leaf venation
C) Presence of vessel elements and absence of archegonia
D) Perianth and two integuments
Explanation
[Solution from source] Gnetum stands apart from Cycas and Pinus because its xylem contains true vessels and its female gametophyte has no archegonia, two features otherwise typical of flowering plants. Apical meristems and embryo development are common to all seed plants, so they do not separate Gnetum from the other gymnosperms. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.