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