Selelct one of the following paris of important features distinguishig Gnetum from Cycas and Pinus and showing affinities with angiosperms

Options

A. Perianth and two integuments
B. Embryo development and apical meristem
C. Absence of resin duct and leaf venation
D. Presence of vessel elements and absence of archegonia

Answer

D

Explanation

Gnetum resembles angiosperm in many aspects:–
* The leaves in gnetum have reticulate venation that is an angiosperm character
* The presence of vessels in the xylem is also an angiosperm character and also found in gnetum.
* In gnetum female gametophyte is only parity cellular before fertilization and completely cellular only after fertilization so the free nuclei act as an egg as there is no archegonium.